درباره ما
AASHTO - American Association of State Highway and Transportation Officials: Recent submissions
Now showing items 241-260 of 2524
-
Standard Specification for Welded Deformed Steel Bar Mats for Concrete Reinforcement
Abstract: This specification covers material in mat (or sheet) form fabricated from deformed steel bars to be used for the reinforcement of concrete. Mats consist of two layers of bars that are assembled at right angles to each ... -
Standard Specification for Steel Sheet Piling
Abstract: This specification covers carbon steel sheet piling of structural quality for use in the construction of dock walls, sea walls, cofferdams, excavations, and like applications. When the steel is to be welded, it is presupposed ... -
Standard Method of Test for Measurements of Pore Pressures in Soils
Abstract: This method covers procedures for determining field pore pressure measurements in natural soils. This does not include methods of pore pressure measurement in the laboratory or field installations in dams. The values ... -
Standard Specification for Steel Castings, Carbon, for General Application
Abstract: This specification covers carbon steel castings for general applications that require up to 485 MPa [70 ksi] minimum tensile strength. Note 1—The grades covered by this specification represent materials that are suitable ... -
Standard Method of Test for Sampling Procedure for Impact Testing of Structural Steel
Abstract: This specification establishes the procedure for Charpy V-notch testing of structural steel and contains two frequencies of testing. The impact properties of steel can vary within the same heat and piece, be it as-rolled, ... -
Standard Practice for Quality Assurance, Job Site Quality Control, and Reapplication of Protective Sealers for Portland Cement Concrete
Abstract: This practice covers procedures and test methods for quality assurance testing and job site quality control for protective sealers for protecting new concrete or prolonging the life of sound, in-service concrete used in ... -
Standard Practice for Accelerated Aging of Hot-Poured Asphalt Crack Sealant Using a Vacuum Oven
Abstract: This standard practice applies to hot-poured asphalt crack sealant used in the construction and maintenance of roadways. The standard practice covers the accelerated aging of hot-poured asphalt crack sealant material by ... -
Standard Specification for Steel-Reinforced Polyethylene (PE) Ribbed Pipe, 300- to 1500-mm (12- to 60-in.) Diameter
Abstract: This specification covers the requirements and methods of tests for steel-reinforced polyethylene (PE) ribbed pipe, couplings, and fittings for use in surface and subsurface drainage applications. Nominal sizes of 300 to ... -
Standard Specification for Steel Bars, Carbon, Hot-Wrought, Special Quality, Mechanical Properties
Abstract: This specification covers hot-wrought, special quality, carbon steel bars and bar size shapes produced to mechanical property requirements and intended for general constructional applications. The bars are available in ... -
Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
Abstract: This specification covers zinc coatings applied by the hot-dip process on iron and steel hardware. The hot-dip galvanizing process consists of parts being immersed in molten zinc for a time sufficient to allow a metallurgical ... -
Standard Specification for Stress-Relieved Steel Wire for Prestressed Concrete
Abstract: This specification covers two types of stress-relieved, round, high-carbon steel wire commonly used in prestressed linear concrete construction, as follows: Type BA wire is used for applications in which cold-end deformation ... -
Standard Method of Test for Moisture–Density Relations of Soil–Cement Mixtures
Abstract: These methods of test are intended for determining the relation between moisture content and density of soil–cement mixtures when compacted before cement hydration as prescribed. A 944-cm3 (1/30-ft3) mold and a 2.5-kg ... -
Standard Method of Test for Determining the Dynamic Modulus for Asphalt Mixtures Using Small Specimens in the Asphalt Mixture Performance Tester (AMPT)
Abstract: This standard describes test methods for measuring the dynamic modulus for asphalt mixtures using the asphalt mixture performance tester (AMPT). This practice is intended for dense-graded mixtures with nominal-maximum ... -
Standard Method of Test for Stress Sweep Rutting (SSR) Test Using Asphalt Mixture Performance Tester (AMPT)
Abstract: This standard describes a test method to characterize the resistance of asphalt mixtures to rutting using the shift model. The stress sweep rutting (SSR) tests are conducted using the Asphalt Mixture Performance Tester ... -
Standard Method of Test for Determining In-Place Density and Moisture Content of Soil and Soil– Aggregate Using Complex Impedance Methodology
Abstract: This practice describes the procedures for determining the density and moisture content of soil and soil-aggregate using a Complex Impedance Measuring Instrument (CIMI). This practice describes three different electrode ... -
Standard Practice for Preparation of Small Cylindrical Performance Test Specimens Using the Superpave Gyratory Compactor (SGC) or Field Cores
Abstract: This practice covers the use of a Superpave gyratory compactor (SGC) or field cores to prepare 38-mm (1.50-in.) diameter by 110-mm (4.33-in.) height performance test specimens for use in a variety of axial compression and ... -
Standard Method of Test for In-Place Density and Moisture Content of Soil and Soil–Aggregate by Nuclear Methods (Shallow Depth)
Abstract: This test method describes the procedure for determining the in-place density and moisture of soil and soil–aggregate by use of nuclear gauge. The density of the material may be determined by either Direct Transmission, ... -
Standard Method of Test for Hamburg Wheel-Track Testing of Compacted Asphalt Mixtures
Abstract: This test method describes a procedure for testing the rutting and moisture-susceptibility of asphalt mixture pavement samples in the Hamburg Wheel-Tracking Device. The method describes the testing of a submerged, compacted ... -
Standard Method of Test for Preparing and Determining the Density of Asphalt Mixture Specimens by Means of the Superpave Gyratory Compactor
Abstract: This standard covers the compaction of cylindrical specimens of asphalt mixtures using the Superpave gyratory compactor. This standard may involve hazardous materials, operations, and equipment. This standard does not ... -
Standard Method of Test for Viscosity Determination of Asphalt Binder Using Rotational Viscometer
Abstract: This test method outlines the procedure for measuring the viscosity of asphalt binders at elevated temperature from 60 to over 200°C using a Rotational Viscometer apparatus as specified by M 320 and R 29. This standard ...