粘砂土湿粘土和砂子的混合物，带有稻草，专用作制砖和铸模。

A mixture of moist clay and sand, together with straw, used especially in making bricks and foundry molds.

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制得高强度耐火粘土砖的试验结果表明：浸渍处理后的试样，常温耐压强度均获得了不同程度的提高，体积密度增加，气孔率下降。

The result shows that the compressive strength at normal temperature of impregnated samples is raised in varying degree, their bulk density is increased and the porosity is decreased.

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制砖原料中灰渣在煤矸石及粘土中加入最佳分数分别为12%和15%。

The optimum adding percentage of high alkali fly ashes is about 12% to coal gangue and 15% to clay.

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