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.

• 通过对几种缓凝剂与不同品牌水泥净浆凝结时间试验和赤砂糖缓凝剂在高温条件下的水泥净浆凝结时间试验发现赤砂糖缓凝剂是较理想的缓凝剂。