In order to improve crack resistance of concrete, test and analysis are made on the influence of mineral compositions of cement on brittleness of sand grout.

为了提高混凝土的抗裂性能，本文主要从水泥矿物成分对砂浆脆性的影响进行试验研究分析。

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It is suggested to rein - force local bearing wall's strength by raising up the grade of cement sand grout.

建议提高砂浆强度等级在砖砌体局部加强强度。

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Hollow columns were made with sand-cement grout as test samples, on which the failure characteristic was studied in the condition of tri axis hydraulic fracturing.

选用水泥砂浆作为试验材料，研究其在水力劈裂条件下的破坏特征。

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When that happens, and a sinkhole threat has been established, crews can pump a thick grout a mixture of sand and cement into the ground to fill the holes.

NPR: Work Continues, Future Uncertain For Sinkhole Site