D623 improves water retention of fresh mortar and entrains a large amount of micro air void which causes bulk density to reduce, pore size distribution to change.
D623提高保水新鲜砂浆和夹带了大量的微空隙，这会导致堆积密度降低，孔径分布改变。
D623 improves water retention of fresh mortar and entrains a large amount of micro air void which causes bulk density to reduce, pore size distribution to change.
D623提高保水新鲜砂浆和夹带了大量的微空隙，这会导致堆积密度降低，孔径分布改变。
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