土木工程材料双语英文试题

《土木工程材料》主要的计算类型：

1.Mix design calculation show a dry mix of cement 310kg, water 180kg, sand

688kg, and gravel 1220kg. The moisture contents of sand and gravel are

3.5% and 1.8% respectively. Find the field mix proportions.

2.Dry mix proportions of C20 concrete is 1:2.6:4.6:0.6, the other conditions are:

specific gravity of cement=3.1g/cm3, Apparent density of sand=2.6g/cm3 Please calculate；

(1)The amount of each compound in 1m3 concrete.

(2)When check the above mix proportions and 5% of cement and water must be

extra-added to obtain qualified slump, and the apparent density of concrete mixture is tested as 2390kg/m3, please determine the amount of each compound after adjusting its workability.

3.The sieve analysis results of sand is as follows:

Please judge how about the fineness of sand.

4. 500g river sand is oven dried to a constant weight 486g, please calculate water absorption of this sand.

5.The raw materials used in concrete are the following:

Cement: 42.5MPa, Gravel: crushed stone, W/C=0.60

Question: Whether this materials can be used to produce some C30 concrete?

6. One block of standard clay brick, the dimension is 240mm×115mm×53mm. its

density is 2.7g/cm3，its dry weight is 2500g，and its mass at water saturated state is 2900g.

Calculate please:

（1）the dry apparent density of this brick;

（2）porosity of this brick;

（3）water-absorption ratio according to volume.

7. Suppose to test the compressive strength of concrete specimens with the dimension of 100mm×100mm×100mm at 28days. The three test results are 42MPa, 38MPa and 35MPa separately. Please evaluate the strength grade of this batch of concrete.