1.The muscovado retarder is more retarder through the setting time experiments of several retarder applied the different brand cement and muscovado applied under the hot conditions.

1.通过对几种剂与不水泥净浆结间试验和赤砂剂在高温条件下的水泥净浆结间试验发现赤砂剂是较理想的剂。