Desulphurization render gypsum can be prepared using composite retarder and some tests study on the setting time and mechanical property of desulphurization render gypsum.
采用自制的复合缓凝剂配制出脱硫粉刷石膏，并对脱硫粉刷石膏的凝结时间及力学性能进行了研究。
When the s type retarder is added to the plaster, the setting time of plaster is delayed significantly and the strength is a little lower.
建筑石膏中掺入S型缓凝剂可使凝结时间显著延缓，但强度略有降低。
The effect of retarder on setting time, strength of hardened paste and crystallization habit of building gypsum was studied.
考察各种缓凝剂对建筑石膏凝结时间、硬化体强度以及结晶习性的影响。
Cement prepared with solidified phosphogypsum as retarder had similar setting time as cement prepared with natural gypsum and higher strength than them.
固化磷石膏磨制的水泥和天然二水石膏磨制水泥相比，二者的凝结时间最接近，强度有一定的提高。
The effect of bone glue protein retarder on setting time and strength of gypsum is studied.
研究了骨胶蛋白质石膏缓凝剂对石膏凝结时间和强度的影响。
The test results show that the quicker the initial set of plaster the greater the difference between the initial setting times of the plaster with addition of s type retarder.
试验结果表明，所用建筑石膏的初凝时间愈快，掺有S型缓凝剂后其初凝时间差愈大。所以，初凝时间差不宜作为石膏缓凝剂的缓凝效果指标。
In this study, tests for initial setting time of plaster are conducted by adopting plaster with 4 different initial setting times and by adding s type retarder for plaster.
本研究采用四种不同初凝时间的建筑石膏，掺入S型石膏缓凝剂，进行了初凝时间的试验。
In this study, tests for initial setting time of plaster are conducted by adopting plaster with 4 different initial setting times and by adding s type retarder for plaster.
本研究采用四种不同初凝时间的建筑石膏，掺入S型石膏缓凝剂，进行了初凝时间的试验。
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