1·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。
2·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。
3·When the sand grout contains limestone powder, the limestone powder can improve the pore structure and decrease the porosity of the sand grout because of its filling effect.
当砂浆含有石灰石粉时，由于石灰石粉具有填充效应，能有效地改善砂浆的孔结构，降低其孔隙率。
4·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。