新型高效混凝土复合早强剂

发布时间：2018-07-07 23:48

本文选题：普通硅酸盐水泥 + 减水剂　；参考：《土木工程与管理学报》2014年04期

【摘要】：本文选用亚硝酸钠、无水硫酸钠、三乙醇胺和聚羧酸减水剂为新型高效复合早强剂的掺料,应用正交实验方法设计实验,从而配置新型高效复合早强剂。实验结果表明,在标准养护条件下,该新型高效复合早强剂可以使得使得水泥试件的1 d强度提高到150%,3 d、7 d、28 d的强度并没有降低;同时,在此基础上,研究该新型高效复合早强剂对复掺矿渣以及粉煤灰水泥强度的影响,结果表明,与不掺粉煤灰以及矿渣的水泥试块相比,当水泥试块的粉煤灰或矿渣的掺量为10%时,该新型高效复合早强剂可以适当的提高胶凝体系的早期强度;但是,当水泥试块的粉煤灰、矿渣掺量为20%及以上时,胶凝体系与空白组相比,抗压强度降低。
[Abstract]:In this paper, sodium nitrite, anhydrous sodium sulfate, triethanolamine and polycarboxylic acid superplasticizer are used as admixtures of new high efficiency composite early strength agent. The experimental results show that under the standard curing conditions, the strength of the cement specimen can be increased from 1 d to 150 d ~ 7 d ~ (28 d) with the new high efficiency composite early strength agent, and on the basis of this, the strength of the cement specimen is not decreased. The effect of this new type of high efficiency composite early strength agent on the strength of slag and fly ash cement is studied. The results show that compared with the cement sample without fly ash and slag, when the content of fly ash or slag in cement sample is 10%, The early strength of the cementitious system can be improved by the new high efficiency composite early strength agent, but when the fly ash and slag of the cement sample are 20% or more, the compressive strength of the cementitious system is lower than that of the blank group.
【作者单位】：华中科技大学土木工程与力学学院;
【分类号】：TU528.042.1

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