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通过比较两组完全相同组份制备的干混砂浆,研究了机制砂与天然河沙对干混砂浆含气量的影响,试验结果表明河沙可以获得高出机制砂4%的含气量,而机制砂中的石粉含量显著的降低了砂浆含气量;进一步比较SDS、AOS和改性松香酸钠三种引气剂在不同掺量下的干混砂浆含气量,可以发现随着掺加量的增加,使用SDS的砂浆含气量先下降低后增加;采用AOS的砂浆含气量则表现稳定;而采用改性松香酸钠的砂浆含气量则表现为先降低后增加,最后基本恒定。
The effects of mechanical sand and natural sand on the gas content of dry-mixed mortar were studied by comparing two dry mortars prepared with the same composition. The experimental results show that the sand content can be 4% higher than that of the sand, while the mechanism The content of stone powder in sand significantly reduced the gas content of mortar. Comparing the gas content of dry-mixed mortar with different content of SDS, AOS and modified sodium rosinate, it can be found that with the increase of the content , And the air content of mortar using SDS decreased first and then increased; the air content of mortar using AOS was stable; while the content of mortar with modified sodium rosinate decreased first and then increased, and finally was basically constant.