掺改性油茶皂甙引气剂混凝土的性能研究

从新拌混凝土的含气量、凝结时间以及硬化混凝土强度等角度评价了改性油茶皂甙引气剂掺量对混凝土性能的影响。结果表明,引气剂掺量小于0.15‰时,含气量1h经时变化量均介于-1.5%～1.5%;掺量小于0.25‰时,改性油茶皂甙引气剂对凝结时间的延迟小于2h;引气剂的掺入对早期强度有所提高,掺量小于0.15‰时,所有龄期的抗压强度比均大于0.95。综合考虑,改性油茶皂甙混凝土引气剂的适宜掺量为0.05‰~0.15‰。

The effects of the content of air-entraining agent made of modified camellia saponin on the air content,setting time and hardening strength of the concrete are discussed.The experimental results reveal that the air content change in 1 hour is less than-1.5%~1.5 % when the dosage of air-entraining agent is less than 0.15‰;the setting time delay is also less than 2 hours when the dosage of air-entraining agent is less than 0.25‰.Adding this air-entraining agent can increase the early strength,and the compressive strength ratio of all curing ages is greater than 0.95 when the dosage of air-entraining agent is less than 0.15‰.Combination of the factors above,the appropriate dosage of this air-entraining agent is 0.05‰~0.15‰.