Abstract：
The compatibility of cement and admixture is usually tested by methods of cement slurry fluidity, cement sand
water reduction rate, concrete test. Among them, cement slurry fluidity can quickly test the compatibility of cement and
admixture, which is a good test method of compatibility with cement and admixture. A cement group with nearly 100
enterprises needs to use an admixture standard sample to control the quality of the compatibility of cement produced and
admixture by different manufacturers and regions. The reference sample of concrete admixture is a special admixture, which
requires to meet the conditions of uniform and stable, and can quickly and accurately reflect the quality of cement products.
The reference sample requires a shelf life of up to 14 months (the sample is usually prepared once a year, so it requires a
longer shelf life), which far exceeds the national standard requirement of 6 months for shelf life of concrete admixture. In
this paper, the most suitable polycarboxylic acid mother liquor varieties as the reference admixture were screened by the test,
and the shelf life of the admixture samples was effectively extended by the methods of adjusting the pH of the admixture
samples and adding fungicide.
2023, Vol. 0 
