Method for measuring pressure water absorption rate of haycite and method for reducing pressure slump loss of haycite concrete pump
A technology of ceramsite concrete and measurement method, which is applied in the direction of chemical instruments and methods, clay preparation equipment, mixing operation control, etc., and can solve the problems of increased slump loss of concrete
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Embodiment 1
[0035] Example 1: Reducing the slump loss of ceramsite concrete under pump pressure by measuring the pressure water absorption rate of ceramsite
[0036] The raw material is shale ceramsite concrete, and the steps are:
[0037] 1) Determination of pressure water absorption of ceramsite: uniformly select 8 pressure values P in the range of 0-5MPa 1 ~P 8 , followed by 1 MPa, 1.5 MPa, 2 MPa, 2.5 MPa, 3.5 MPa, 4 MPa, 4.5 MPa, 5MPa, respectively measured P 1 ~P 8 Corresponding ceramsite pressure water absorption under pressure W Y1 ~W Y8 ;
[0038] The method for measuring water absorption under pressure of ceramsite in step 1) is as follows: a) Take a sample of shale ceramsite with a particle size of 5-10mm to be tested, dry it in a blast dryer at 105±5°C to constant weight, and weigh it to obtain a dry ceramsite sample. Grain sample mass m 0 ; b) Soak the weighed dry ceramsite sample in water for 24 ± 2 hours, absorb water to saturation under normal pressure, then pl...
Embodiment 2
[0053] Example 2: Decreasing the slump loss of ceramsite concrete under pump pressure by measuring the pressure water absorption rate of ceramsite
[0054] Raw material is clay ceramsite concrete, and step is with embodiment 1:
[0055] According to the test pressure of 1 MPa, 1.5 MPa, 2 MPa, 2.5 MPa, 3.5 MPa, 4 MPa, 4.5 MPa, and 5 MPa, the same batch of clay ceramsite was tested for pressure water absorption. The test results are shown in Table 4.
[0056] Table 4 Pressure water absorption of shale ceramsite under different pressures
[0057]
[0058] With the test pressure P i The increase of the measured ceramsite pressure water absorption w Yi Gradually increase, when the test pressure increases to above 2.5MPa, the range of increase of ceramsite pressure water absorption becomes flat, and the second derivation of ceramsite pressure water absorption to test pressure (ie △ 2 w Yi / △P i 2 ) is the inflection point of the pole curve when it is zero, that is, the ...
Embodiment 3
[0066] Example 3: Comparison of the effects of the conventional method and the method of the present invention for determining the pressure water absorption of ceramsite
[0067] The pressure water absorption test was carried out on the same batch of shale ceramsite, and the measured pressure was 3.0MPa (see Table 1 for the measurement results). The pressure water absorption of ceramsite was measured according to the conventional method and the method of the present invention respectively. The number of samples is not less than 3 groups), the number of samples determined by the two methods is statistically calculated, and the standard deviation of the samples is compared.
[0068] 1. Conventional method to measure water absorption of ceramsite
[0069] (1) The specific method is:
[0070] The first step is to measure the saturated water absorption W of ceramsite under normal pressure G , take about 3000g~4000g of the shale ceramsite sample to be tested, with a particle si...
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