- 目录
- 建筑石膏与胶凝材料
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混合煅烧石膏基自流平材料的研究与工程应用
作者：逄鲁峰1，2，黄凌苗1，杜诗寒3，孙立刚1，付鹏2
（1.山东建筑大学 土木工程学院，山东 济南 250101；2.山东华迪建筑科技有限公司，山东 济阳 251400；
3.山东省环能设计院股份有限公司，山东 济南 250000）
摘要：制备了一种无砂型混合煅烧石膏基自流平材料，通过正交试验研究了悬浮稳定剂、聚羧酸减水剂及消泡剂掺量对自流平材料初始流动度和30 min流动度保持性的影响；通过单因素试验研究了石膏浆体pH值、流平调凝剂掺量和胶凝材料体系对自流平材料的性能影响。结果表明：最佳配合比为混合煅烧石膏（混膏）88%、水泥10%、硅灰2%，悬浮稳定剂0.10%、聚羧酸减水剂0.18%、消泡剂0.012%、流平调凝剂0.025%、碱性调节剂0.27%、可再分散乳胶粉0.8%，制得的无砂型混膏自流平材料初始流动度为149 mm，30 min流动度无损失，1、28 d抗压强度分别为13.75、26.28 MPa，28 d收缩率为0.031%。工程应用表明，该产品施工应用效果较佳。
关键词：混合煅烧石膏；强度；流动性；收缩率
中图分类号：TU56+4.6 文献标识码：A 文章编号：1001-702X（2022）05-0057-05
Research and engineering application of mixed calcined gypsum self-leveling material
PANG Lufeng1，2，HUANG Lingmiao1，DU Shihan3，SUN Ligang1，FU Peng2
（1.School of Civil Engineering，Shandong Jianzhu University，Jinan 250101，China；2.Shandong Huadi Construction TechnologyCo. Ltd.，Jiyang 251400，China；
3.Shandong Huaneng Design Institute Co. Ltd.，Jinan 250000，China）
3.Shandong Huaneng Design Institute Co. Ltd.，Jinan 250000，China）
Abstract：A kind of sandless mixed calcined gypsum self-leveling material was prepared. The effects of suspended stabilizer，polycarboxylic acid water-reducing agent and defoamer on the initial fluidity and 30 min fluidity retention of self-leveling materials were studied by orthogonal experiment. The influence of pH value of gypsum slurry，content of flow level adjusting coagulant and cementing material system on properties of self-leveling material without sand was studied by single factor test. The results show that the best mixture ratio is paste 88%，cement 10%，silica fume 2%，suspension stabilizer 0.1%，polycarboxylic acid water reducing agent 0.18%，defoamer 0.012%，flow level coagulant 0.025%，alkaline regulator 0.27%，and redispersible polymer powder 0.8%. The sandless gypsum base self-leveling material prepared from mixed calcined gypsum has an initial fluidity of 149 mm，a fluidity loss of 0 mm in 30 min，a compressive strength of 13.75 MPa and 26.28 MPa in 1 d and 28 d respectively，and a shrinkage rate of 0.031% in 28 d. Engineering application shows that the product has good application effect.
Key words：mixed calcined gypsum，strength，fluidity，shrinkage rate