定价： 646元 加购物车

定价： 571元 加购物车

This specification deals with the standards for single-cell precast reinforced concrete box sections cast monolithically and proposed for use in the construction of culverts and for the conveyance of storm water industrial sewage. The reinforced concrete shall be composed of cementitious materials, mineral aggregates and water, in which steel has been embedded. The aggregates shall be sized, graded, and mixed to the proportion that will produce a homogeneous mixture. The box sections shall also undergo steam curing, water curing, and membrane curing.1.1 This specification covers single-cell precast reinforced concrete box sections cast monolithically and intended to be used for the construction of culverts and for the conveyance of storm water industrial wastes and sewage.1.2 This specification is the SI companion to Specification C1433.NOTE 1: This specification is primarily a manufacturing and purchasing specification. However, standard designs are included and the criteria used to develop these designs are given in Appendix X1. The successful performance of this product depends upon the proper selection of the box section, bedding, backfill, and care that the installation conforms to the construction specifications. The purchaser of the precast reinforced concrete box sections specified herein is cautioned that he must properly correlate the loading conditions and the field requirements with the box section specified and provide for inspection at the construction site.1.3 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： 843元 加购物车

4.1 This practice is useful as a reference by an owner and the owner’s engineer in preparing project specifications.1.1 This practice covers the installation of precast reinforced concrete box sections cast monolithically and intended to be used for the conveyance of storm water, industrial wastes and sewage, and for passageways.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 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 加购物车

1.1 This specification covers the manufacturing requirements for precast reinforced concrete monolithic box sections that are intended to be installed using jacking techniques. The typical use of this type of product is for the construction of culverts and for the conveyance of storm water, industrial wastes and sewage.1.2 The requirements of this specification are intended to supplement the existing manufacturing standards for precast reinforced concrete box sections and provide the additional manufacturing details required for box sections that will be installed using jacking techniques. The parent manufacturing standard for the precast reinforced concrete box sections is denoted as the “designated precast reinforced concrete box section manufacturing standard” throughout this document. The requirements included within shall supplement and supersede the designated precast reinforced concrete box section manufacturing standard when the box sections are to be used for jacking.NOTE 1: This specification is a manufacturing and purchase specification for precast reinforced concrete box sections installed using jacking techniques, to be utilized in conjunction with the designated precast reinforced concrete box section manufacturing standard. It is possible that such box sections will require a special design to withstand the anticipated longitudinal loading. Additional calculations and information beyond what are required for a non-jacked installed box section are required to establish maximum jacking forces. For calculating allowable jacking forces, ASCE 28 may be referenced.NOTE 2: This standard may be used to supplement existing standards for precast reinforced concrete box sections when the box sections will be installed using trenchless methods. Such “designated precast reinforced concrete box section manufacturing standards” include, but are not limited, to ASTM C1433, ASTM C1577, and AASHTO M259.1.3 Units—The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.1.4 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.1.5 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： 515元 加购物车

定价： 927元 加购物车

定价： 571元 加购物车

定价： 646元 加购物车

This specification covers joints for precast concrete pipe and box and other sections using preformed flexible joint sealants for use in storm sewers and culverts which are not intended to operate under internal pressure, or are not subject to infiltration or exfiltration limits. Joint material used in horizontal applications is intended to prevent the flow of solids through the joint. The acceptability of the pipe joint and sealant shall be determined by the results of the physical tests prescribed. Bitumen sealants shall be produced from asphalts, hydrocarbon resins and plasticizing compounds reinforced with inert mineral filler and shall contain no solvents. Butyl rubber sealants shall be produced from blends of butyl rubber and refined hydrocarbon resins and plasticizing compounds reinforced with inert mineral filler and shall contain no solvents. The joint design shall consist of a bell or groove on one end of the section and a spigot or tongue on the adjacent end of the joining section. The different test methods for the determination of the composition and physical properties of bitumen or butyl sealants are presented in details. The sections shall be tested hydrostatically in vertical alignment and a sufficient number of sections shall be assembled in straight alignment.1.1 This specification covers joints for precast concrete pipe and box, and other sections using preformed flexible joint sealants for use in storm sewers and culverts which are not intended to operate under internal pressure, or are not subject to infiltration or exfiltration limits. Joint material used in horizontal applications is intended to prevent the flow of solids through the joint.1.2 For precast concrete manhole sections and other vertical structures, which are subject to internal or external pressure, infiltration or exfiltration limits are not prohibited from being specified. Joints in vertical structures covered by this specification are intended mainly to prevent the flow of solids or fluids through the joint.1.3 This specification is to be used with pipe and structures conforming in all respects to Specifications C14, C76, C478, C506, C507, C655, C985, C1433, C1504, and C1577, provided that if there is a conflict in permissible variations in dimensions, the requirements of this specification shall govern.1.4 This specification is the inch-pound companion to C990M; therefore, no SI equivalents are presented in the specification.NOTE 1: This specification covers the material and performance of the joint and sealant only. Infiltration and exfiltration quantities for installed sections are dependent on factors other than the joints which must be covered by other specifications and suitable testing of the installed pipeline.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： 515元 加购物车

5.1 The CPL test is intended as a performance test to quantify the benefits of geosynthetics in pavement structures, as recommended by AASHTO R 50-09. Performance is predominantly defined in terms of S-TBR.5.2 The CPL test is a laboratory test used to accelerate rutting in a roadway cross section using a stationary cyclic plate. While the application of load differs from actual roads, the results from similarly constructed CPL tests are useful to evaluate and compare the performance of various products or designs. The results from these tests are most relevant to roads having similar design characteristics (material strengths and thicknesses).NOTE 1: The extrapolation of cyclic plate results to designs that deviate significantly from the parameters tested may not be accurate, and performance calculations made at significantly different load cycle levels than the expected service life of an actual pavement may not provide an accurate estimate of the benefits actually realized.5.3 The number of load cycles applied by the CPL device corresponds to the number of equivalent single-axle loads (ESALs) used in the AASHTO 1993 pavement design equation.5.4 The test method is applicable to geosynthetics and soils used in typical pavement applications.5.5 This test method produces test data that can be used to compare geosynthetic products, construction methods, and cross section configurations used in design of roads.5.6 This test can be used to characterize specific behaviors of the geosynthetic under the conditions tested by including sensors to measure stresses and strains within the pavement cross section or on the geosynthetic itself. Sensors should be appropriately sized and installed to minimize their influence on the results of the test.5.7 The relationship between load cycles and deformation is a function of the composite stiffness of the constructed system and the interdependence between the individual components of the design.1.1 This standard test method outlines the procedure used to determine the performance of unpaved and paved roadway cross sections, with and without geosynthetics, that are built in a controlled manner and tested using a stationary, cyclic load applied to the surface to simulate traffic.1.2 Test section performance from these tests is normally calculated as a function of life extension, but can also be determined based on structural improvement. Life extension is related to the number of load cycles that can be accommodated by a particular configuration when compared to a similarly constructed control. Structural improvements are based on elemental or system-wide stiffness increases.1.3 The cyclic plate load (CPL) test is intended to be a performance test conducted as closely as possible to as-built unpaved and paved roadway cross sections. It has been used as a tool to compare different geosynthetics; soil types, strengths, and thicknesses; and construction procedures for a variety of pavement applications.1.4 Units—The values stated in SI units are to be regarded as standard. Values in parentheses are 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, 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 加购物车

定价： 515元 加购物车

定价： 646元 加购物车

This specification covers joints for precast concrete pipe and box and other sections using preformed flexible joint sealants for use in storm sewers and culverts which are not intended to operate under internal pressure, or are not subject to infiltration or exfiltration limits. Joint material used in horizontal applications is intended to prevent the flow of solids through the joint. The acceptability of the pipe joint and sealant shall be determined by the results of the physical tests prescribed. Bitumen sealants shall be produced from asphalts, hydrocarbon resins and plasticizing compounds reinforced with inert mineral filler and shall contain no solvents. Butyl rubber sealants shall be produced from blends of butyl rubber and refined hydrocarbon resins and plasticizing compounds reinforced with inert mineral filler and shall contain no solvents. The joint design shall consist of a bell or groove on one end of the section and a spigot or tongue on the adjacent end of the joining section. The different test methods for the determination of the composition and physical properties of bitumen or butyl sealants are presented in details. The sections shall be tested hydrostatically in vertical alignment and a sufficient number of sections shall be assembled in straight alignment.1.1 This specification covers joints for precast concrete pipe and box and other sections using preformed flexible joint sealants for use in storm sewers and culverts which are not intended to operate under internal pressure, or are not subject to infiltration or exfiltration limits. Joint material used in horizontal applications is intended to prevent the flow of solids through the joint.1.2 Precast concrete manhole sections and other vertical structures that are subject to internal or external pressure, infiltration, or exfiltration limits are not prohibited from being specified. Joints in vertical structures covered by this specification are intended mainly to prevent the flow of solids or fluids through the joint.1.3 This specification is to be used with pipe and structures conforming in all respects to Specifications C14M, C76M, C478M, C506M, C507M, C655M, C985M, C1433M, C1504M, and C1577, provided that if there is a conflict in permissible variations in dimensions, the requirements of this specification shall govern.1.4 This specification is the metric companion of Specification C990.NOTE 1: This specification covers the material and performance of the joint and sealant only. Infiltration and exfiltration quantities for installed sections are dependent on factors other than the joints which must be covered by other specifications and suitable testing of the installed pipeline.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： 515元 加购物车

This specification covers single-cell precast reinforced concrete box sections cast monolithically and intended to be used for the construction of culverts and for the conveyance of storm water, industrial wastes and sewage. The reinforced concrete shall consist of cementitious materials, mineral aggregates and water, in which steel has been embedded in such a manner that the steel and concrete act together. The precast reinforced concrete box sections shall be produced with tongue and groove ends. The box section shall be cured using any of the following methods or combinations thereof: steam curing; water curing; and membrane curing. Compression tests for determining concrete compressive strength shall be allowed to be made on either standard rodded concrete cylinders or concrete cylinders compacted and cured in like manner as the box sections, or on cores drilled from the box section.1.1 This specification covers single-cell precast reinforced concrete box sections cast monolithically and intended to be used for the construction of culverts and for the conveyance of storm water, industrial wastes and sewage.NOTE 1: This specification is primarily a manufacturing and purchasing specification. However, standard designs per the AASHTO LRFD Bridge Design Specifications are included and the criteria used to develop these designs are given in Appendix X1. The successful performance of this product depends upon the proper selection of the box section, bedding, backfill, and care that the installation conforms to the construction specifications. The purchaser of the precast reinforced concrete box sections specified herein is cautioned that proper correlation of the loading conditions and the field requirements with the box section specified, and provision for inspection at the construction site, are required.1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.1.3 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： 843元 加购物车

This specification covers precast reinforced concrete box sections comprised of separate segments that once properly field assembled make the final structure. These structures are intended to be used for the construction of culverts and for the conveyance of storm water, industrial wastes, and sewage. This specification provides requirements for the acceptability of the box sections, material and manufacture, design, reinforcement, joints, repairs, inspection, and product marking.1.1 This specification covers precast reinforced concrete box sections comprised of separate segments that once properly field assembled make the final structure. These structures are intended to be used for the construction of culverts and for the conveyance of storm water, industrial wastes and sewage.NOTE 1: This specification is primarily a manufacturing and purchasing specification. However, box culverts manufactured to this standard are intended to meet the design requirements of the AASHTO LRFD Bridge Design Specifications, and as such, design guidance is included in Appendix X1.NOTE 2: The successful performance of this product depends upon the proper selection of the box section, bedding, backfill, and care that the installation conforms to the construction specifications. The purchaser of the precast reinforced concrete box sections specified herein is cautioned that proper correlation of the loading conditions and the field requirements with the box section specified, and provision for inspection at the construction site, are required.1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.1.3 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 加购物车