Tiêu chuẩn quốc tế

Số hiệu Standard Number AASHTO T 134:2019 Năm ban hành 2019 Publication date Tình trạng A - Còn hiệu lực Status
Tên tiếng Anh Title in English Standard Method of Test for Moisture–Density Relations of Soil–Cement Mixtures
Thay thế cho Replace AASHTO T 134:2005
Số trang Page 7 Giá: Price Liên hệ / Contact us
Phạm vi áp dụng Scope of standard 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 (5.5-lb) rammer dropped from a height of 305 mm (12 in.) are used and two methods, depending on soil gradation, are covered, as follows: Method A-Soil material passing a 4.75-mm (No. 4) sieve. This method shall be used when 100 percent of the soil sample passes the 4.75-mm (No. 4) sieve; or Method B-Soil material passing a 19.0-mm (³/₄-in.) sieve. This method shall be used when part of the soil sample is retained on the 4.75-mm (No. 4) sieve. This test method applies to soil-cement mixtures that have 30 percent or less retained on the 19.0-mm (³/₄-in.) sieve, when Method B is used. The material retained on the 19.0 mm (³/₄-in.) sieve shall be defined as oversized particles (coarse particles). The following applies to all specified limits in this standard: For the purposes of determining conformance with these specifications, an observed value or a calculated value shall be rounded off "to the nearest unit" in the last right-hand place of figures used in expressing the limiting value, in accordance with ASTM E29.