fly ash bricks;  orthogonal design;  Compressive strength

With wet discharge fly ash, cement, aggregate and other materials, appropriate addition of admixtures and stimulants to stimulate the activity of fly ash, using molding and natural conservation to make double-free fly ash bricks, measuring the compressive strength of fly ash bricks and other indicators. By adjusting the amount of fly ash brick materials, using the orthogonal design method, a total of 9 groups of 81 specimens and test blocks with different mix ratios were tested, and the relationship between the mixing ratio of various materials and the compressive strength of fly ash bricks was found out through experiments, and the best ratio of fly ash bricks with various indicators reaching or exceeding the current compression molding and natural conservation of clay bricks was obtained.