灌砂法使用说明书(英文)

INSTRUCTION MANUAL FOR SAND-CONE METHOD DENSITY TEST (SAND-CONE METHOD)

1.Purpose and Range of Application

The test is applied to the foundation course (or subbase course) of field measurement, density and compactness of compacted layer of various materials in foundation earth layer of the sand-gravel surface road. It is also applied to the density and compactness of asphaltic surface treatment and asphalt-injected surfacing. But it’s not allowed to apply to the compactness of macroscopic void or macrovoid. It shall be in accordance with the following requirements:

(1)When the maximum particle diameter of base material is less than 15 mm and the

thickness of measured course is not exceed 150 mm, it’s prefer to use 100 mm in diameter small-sized sand-cone barrel to test.

(2)When the maximum particle diameter of base material is equal to or greater than

15 mm but less than 40 mm and the thickness of measured course is exceed 150

mm but not exceed 200 mm，it shall use 150 mm in diameter macro-sized sand-cone barrel to test.

2.Instruments and Materials

Sand-cone barrel, metal calibration can, base plate, sand (0.30~0.60mm or 0.25~0.50 mm in diameter of clean and dry uniform sand)20~40g.

3.Method and Procedures

(1)Demarcate the mass of sands in cone bottomed of the sand-cone barrel

(2)Demarcate the unit mass of quantitative sands

(3)Put the sand-cone barrel filled with quantitative sands (M5) on the circular hole of

base plate, and turn on a switch of sand-cone barrel so as to not make the sands flow into the hollow space until the sands stop flowing. Then take sand-cone barrel down and weigh (M6) 1g sands accurately.

(4)Weigh the quality (Mw) of all materials in experimental hole.

(5)Take the typical sample out of all materials dug up, and test the moisture content

(ω%). As the test used by small sand-cone barrel, fine grained soils shall not be light than 100g and medium grained soil shall not be light than 500g. As the test used by small sand-cone barrel, fine grained soils shall not be light than 200g and medium grained soil shall not be light than1000g, then weigh the quality of coarse-grained soil or inorganic binding stable material which shall not be light than 2000g.

(6)Put the base plate on the experimental holeand sand-cone barrel shall be placed in

the middle of base plate. Turn on the switch of sand-cone barrel so as to not make the sands flow into the hollow space until the sands stop flowing. Weigh the quality of sands (M4) in the barrel.

(7)If the rough part of cleaned flat surface is not large, it could omit the step 3. When