定价： 260元 / 折扣价： 221 元 加购物车

定价： 0元 / 折扣价： 0 元 加购物车

定价： 260元 / 折扣价： 221 元 加购物车

定价： 156元 / 折扣价： 133 元 加购物车

定价： 260元 / 折扣价： 221 元 加购物车

This specification establishes the material and manufacturing requirements for water-based asphalt emulsion (mineral colloid or chemically stabilized type) pavement sealers suitable for use as a weather-protective coating over bituminous pavements, such as roadways, driveways, and parking areas. The base asphalt emulsion shall be made using binders prepared from crude petroleum; the mineral filler (when used), shall consist of finely ground clay, silica, limestone, slate, basalt, slag, or other inert inorganic filler materials; and the aggregate shall be either a natural or manufactured angular aggregate composed of clean, hard, durable particles free of clay or other objectionable material. The aggregate to be used shall follow the manufacturer's recommendations; however, 100% of the aggregate shall pass a 2.38 mm [No. 8] mesh-sieve at all times. Aggregate may either be added at the point of manufacture, post-added at the job site, or both. The use of an additive is optional and shall be approved by the asphalt emulsion pavement sealer manufacturer.This specification also covers the physical requirements, sampling, inspection, and packaging and package marking for asphalt emulsion pavement sealers (mineral colloid or chemically stabilized type).1.1 This specification covers water-based asphalt emulsion (mineral colloid or chemically stabilized type) pavement sealer suitable for use as a weather-protective coating over bituminous pavements, such as roadways, parking areas, and driveways.NOTE 1: Application shall be made in accordance with a forthcoming ASTM standard on the application of asphalt emulsion pavement sealer.1.2 The values stated in SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

This specification covers nickel-iron-chromium-molybdenum-columbium stabilized alloy (UNS N08700) plate, sheet, and strip in the solution-annealed condition. Minor cold working such as flattening or temper rolling may be performed after the final solution annealing treatment. The material shall conform to the chemical requirements for nickel, iron, chromium, molybdenum, columbium, carbon, silicon, manganese, phosphorus, sulfur, and copper. The material shall conform to the mechanical property requirements for tensile strength, yield strength, elongation, and Rockwell hardness. The material shall be free of injurious imperfections and shall correspond to the designated finish for sheet, strip, and plate. Test methods (chemical analysis, tension test, corrosion test) for chemical composition and mechanical properties determination shall be performed in accordance to referenced ASTM documents itemized herein.1.1 This specification covers nickel-iron-chromium-molybdenum-niobium stabilized alloy (UNS N08700)2 plate, sheet, and strip in the solution-annealed condition.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

Coring is performed to evaluate construction control and physical properties of stabilized soil.Coring is conducted to determine the quality and the total thickness of the stabilized soil and to evaluate bonding between lifts.Coring stabilized soil before it has cured to at least 2100 kPa (300 psi) compressive strength can cause excessive breakage in the core.If lab-cured specimens are prepared, samples may be cored to correlate with specified break intervals of the lab-cured specimens. Typical curing time intervals are 7, 28, 60, or 90 days or combinations thereof after placement. Twenty-eight (28) days after placement is the most common time interval for first drilling cores.Note 2—The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.1.1 This guide covers obtaining cores of soil-cement or lime-stabilized soil for use in determining compressive strength, lift thickness and bond strength, and other physical properties. This guide is primarily for use in coring through shallow (0.3 to 3 m (1 to 10 ft) thick) layers of cement or lime-stabilized soils containing particles < 50 mm (2 in.) in diameter to the underlying foundation.Note 1—This guide could be used for some Class C self-cementing fly ash materials, which may also stabilize soil.1.2 This guide does not cover material of less than 2100 kPa (300 psi) compressive strength such as cement-soil-bentonite mixtures or some controlled low strength materials (CLSM).1.3 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026.1.4 The values stated in SI units are to be regarded as the standard. Other values are examples or for information only.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 8.1.6 This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This guide cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this guide may be applicable in all circumstances. This guide is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this guide be applied without consideration of a project's many unique aspects. The word “Standard” in the title of this document means only that the document has been approved through the ASTM consensus process.1.7 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.

定价： 0元 / 折扣价： 0 元

5.1 Knowledge of the boiling point distribution of stabilized crude oils is important for the marketing, scheduling, and processing of crude oil in the petroleum industry. Test Method D7169 and IP 545 purport to give such a distribution in crude oils, but are susceptible to significant errors in the light ends portion of the distribution as well as in the mass recovery of the whole crude oil due to the interference imposed by the diluent solvent. This test method allows for more accurate determination of the front end of the boiling point distribution curve, in addition to providing important C1 to C9 (nonane) component level information, and more accurate mass recovery at C9 (nonane).1.1 This test method specifies a method to determine the boiling range distribution of hydrocarbons in stabilized crude oil up to and including n-nonane. A stabilized crude oil is defined as having a Reid Vapor Pressure equivalent to or less than 82.7 kPa. The results of this test method can be combined with those from Test Method D7169 and IP 545 to give a full boiling point distribution of a crude oil (see Appendix X3).1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 646元 / 折扣价： 550 元 加购物车

This specification covers nickel-iron-chromium-molybdenum-columbium stabilized alloy (UNS N08700) bar. The final treatment of the material shall be a solution anneal. Straightening or cold finishing, or both, may be performed after the final solution annealing operation. Cold drawing to more than a minor sizing reduction after the final solution annealing is not recommended. Heat analysis shall conform to the requirements as to chemical composition prescribed. Tensile strength, yield strength, and elongation shall conform to the mechanical property requirements of the material as set by this specification. Test methods such as corrosion test, chemical analysis, tension test, and rounding procedure test shall be carried out.1.1 This specification covers nickel-iron-chromium-molybdenum-columbium stabilized alloy (UNS N08700)2 bar.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 0元 / 折扣价： 0 元

1.1 These test methods provide a means for determining low levels of 1,1,1-trichloroethane and methylene chloride in virgin or reclaimed trichloroethylene and tetrachloroethylene. 1.2 Two test methods are covered, as follows: 1.2.1 Test Method A -Capillary column gas chromatographic determination of 1,1,1-trichloroethane and methylene chloride in trichloroethylene and tetrachloroethylene. 1.2.2 Test Method B-Packed column gas chromatographic determination of 1,1,1-trichloroethane and methylene chloride in trichloroethylene and tetrachloroethylene. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

定价： 0元 / 折扣价： 0 元

5.1 This standard is intended for the preparation of standard specimens of soil-asphalt mixtures suitable for tests of Test Methods D1560, D1561, D4123, and other tests using specimens of the above dimensions. This standard is limited to only fine-grained soils as defined in 7.1.NOTE 1: The quality of the results produced by this standard is dependent on the competence of the personnel performing it and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing, sampling, inspection, and so forth. Users of this standard are cautioned that compliance with Practice D3740 does not in itself ensure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.1.1 This standard covers the selection and proportioning of soils and emulsified or cutback asphalts and the fabrication of 100-mm [4-in.] diameter by 65-mm [2.5-in.] high test specimens.1.2 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026.1.2.1 The procedures used to specify how data are collected/recorded or calculated in the standard are regarded as industry standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the users objectives; and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design.1.3 Units—The values stated in either SI units or inch-pound units [presented in brackets] are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.1.3.1 The gravitational system of inch-pound units is used when dealing with inch-pound units. In this system, the pound (lbf) represents a unit of force (weight) while the unit for mass is slugs. The rationalized slug unit is not given, unless dynamic (F=ma) calculations are involved.1.3.2 It is common practice in the engineering/construction profession to concurrently use pounds to represent both a unit of mass (lbm) and of force (lbf). This implicitly combines two separate systems of units; that is, the absolute system and the gravitational system. It is scientifically undesirable to combine the use of two separate sets of inch-pound units within a single standard. As stated, this standard includes the gravitational system of inch-pound units and does not use/present the slug unit for mass. However, the use of balances or scales recording pounds of mass (lbm) or recording in lbm/ft3 shall not be regarded as nonconformance with this standard.1.4 This standard offers a set of instructions for performing one or more specific operations. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this standard may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project's many unique aspects. The word “Standard” in the title of this document means only that the document has been approved through the ASTM consensus process.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

1.1 This specification covers material requirements for high-purity, dense zirconium oxide partially stabilized by magnesium oxide (magnesia partially stabilized zirconia (Mg-PSZ)) for surgical implant applications.1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

4.1 Mechanically stabilized earth walls (MSEW) are engineered earth retaining structures comprised of pre-fabricated wall facing elements and select backfill that is reinforced with inextensible steel elements. The complete system consists of the original ground, concrete leveling pads, wall facing panels, coping, soil reinforcement, and select backfill. A MSEW is typically subjected to earth loads and surface loads (surcharges). The MSEW relies on self-weight and friction to resist the destabilizing earth forces acting at the back of the reinforced soil zone. They are used frequently in transportation-related civil engineering applications. Fig. 1 shows a cross section of a typical panel faced MSEW, and Fig. 2 shows the components. Fig. 3 shows a cross section of a typical wire faced MSEW cross section, and Fig. 4 shows the components.FIG. 1 Typical Panel Faced MSEW Cross SectionFIG. 2 Components of Typical Panel Faced MSEWFIG. 3 Typical Wire Faced MSEW Cross SectionFIG. 4 Components of Typical Wire Faced MSEW1.1 Mechanically stabilized earth walls (MSEW) covered in this standard practice are engineered earth retaining structures comprised of pre-fabricated wall facing elements and select backfill reinforced with inextensible steel elements. This practice covers procedures and components for the construction of MSEW including soil reinforcement, connections to panels, and selection and placement of granular backfill. Such walls may have a segmental precast concrete (SPC) facing or a flexible wire facing. This standard practice does not address the design of MSEW.1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

4.1 This specification denotes limits on the 5 categories of latex as defined in the scope and defines the test methods to use for the specified properties. These test methods may be used for production control or for referee purposes.AbstractThis specification establishes the requirements for first grade concentrated natural rubber latex of the following categories: Category 1, centrifuged Hevea natural latex preserved with ammonia only or by formaldehyde followed by ammonia; Category 2, creamed Hevea natural latex preserved with ammonia only or by formaldehyde followed by ammonia; Category 3, centrifuged Hevea natural latex preserved with low ammonia with other necessary preservatives; and Category 4, centrifuged, or centrifuged and creamed, guayule latex, or other natural rubber latex, containing a specified dry weight amount of latex, with ammonia or other hydroxide, with other necessary preservatives and stabilizers. This specification applies to natural latex sources other than Hevea brasiliensis but does not apply to compounded latex concentrates. Materials shall be tested by analytical procedures that determine the following chemical properties an substances: total solids; dry rubber content; protein content; total alkalinity; viscosity; sludge content; coagulum content; KOH number; pH; mechanical stability; copper and manganese; density; volatile fatty acids; boric acid; and dry films.1.1 This specification covers requirements for first grade concentrated natural rubber latex (see Table 1) of the following categories:Category 1—Centrifuged Hevea natural latex stabilized with ammonia only.Category 2—Creamed Hevea natural latex stabilized with ammonia only.Category 3—Centrifuged Hevea natural latex stabilized with low ammonia.Category 4—Centrifuged, or centrifuged and creamed, guayule latex, or other natural rubber latex, containing less than 200 µg total protein per gram dry weight of latex, with ammonia or other hydroxide.Category 5—Centrifuged Hevea natural latex treated with aluminum hydroxide or by other means, stabilized with ammonia only containing less than 0.5 % non-rubber content.1.2 This specification is not necessarily applicable to latices prepared, stabilized, or preserved by other methods, and shall not be construed as limiting the desirability or usefulness of other categories of latices. It does apply to natural latex sources other than Hevea brasiliensis but does not apply to compounded latex concentrates.1.3 The analytical procedures applicable to the specifications are included and appear in the following order:  Section    Sampling 6 and 7    Total Solids 8 – 17    Dry Rubber Content 18    Protein Content 19    Total Alkalinity 20    Viscosity 21    Sludge Content 22    Coagulum Content 23    KOH Number 24    pH 25    Mechanical Stability 26    Copper and Manganese 27    Density 28 – 40    Volatile Fatty Acids 41 – 45    Boric Acid 46    Dry Films 47    Precision for All Test Methods 481.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 646元 / 折扣价： 550 元 加购物车