A kind of determination method of water consumption of cement standard consistency

Abstract

The invention discloses a method for measuring water requirement of normal consistency of cement. The method includes the following steps: 1) mixing 500g of a cement sample and 142.5mL of water with acement paste mixer to obtain cement paste, and using a substitutive method Vicat Apparatus to measure the cement paste to obtain the sinking depth of a test cone; 2) calculating the water requirementof the normal consistency of the cement by substitution of the sinking depth of the test cone of the step 1 into formula P =-0.2230S + 35.1593 (P is the water requirement of the normal consistency ofthe cement, %, S is the sinking depth of the test cone, mm). The water requirement of the normal consistency of the cement, measured by the method is highly-close to the true value, and the relativeerror is less than 1%. The cement paste with the normal consistency prepared on the basis of the measured value is verified by a standard method and the regulated water requirement method in a substitute method to verify that the measured water requirement of the normal consistency of the cement is within the standard value.

Description

technical field [0001] The invention belongs to the technical field of cement quality detection, in particular to a method for measuring the water consumption of cement standard consistency. Background technique [0002] Cement is an important building material in concrete engineering, and its quality directly determines the quality of concrete engineering. In the process of testing the physical properties of cement, the main indicators that determine the quality of cement include stability and setting time in addition to strength, and the testing of these two indicators is carried out on the basis of standard consistency slurry, so the standard for preparing cement Consistency clean pulp is the key. In the process of preparing cement standard consistency slurry, accurately determining the water consumption of standard consistency is the decisive factor. Different cement types and different batches of the same cement type have different cement standard consistency water co...

AI Technical Summary

Problems solved by technology

However, in actual work, it is found that using the constant water consumption method of the substitution method in GB / T1346-2011 and using the formula P=33.4—0.185S to calculate the water consumption of standard consistency is far from the true value of water consumption of standard consistency. The cement paste with standard consistency prepared by the estimated value is far from reaching the test cone sinking depth of 30mm ± 1mm ​​through the method of adjusting the water consumption in the substitution method, and it cannot reach the standard value of 6m when tested by the standard method in GB / T1346-2011 ±1m, so the estimated value of this formula has no guiding significance for actual operation, and this formula needs to be revised

Images