- 目录
- 建筑石膏与胶凝材料
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高强套筒灌浆料的制备及性能研究
作者：罗晓峰，邢国徽，何余良
（浙江工业职业技术学院 建筑工程学院，浙江 绍兴 312000）
摘要：研究了水胶比、胶砂比、矿物掺合料及纳米材料对高强套筒灌浆料性能的影响。结果表明，随着水胶比的减小、胶砂比增大，高强套筒灌浆的初始及30 min流动度降低，各龄期抗压强度提高；氧化石墨烯对套筒灌浆料的流动性影响最小，抗压强度提高最明显。高强套筒灌浆料的优化配合比为：胶凝材料由85%水泥+2%石膏+3%粉煤灰+5%精细沉珠+5%硅灰组成，水胶比为0.08，胶砂比为1.86，聚羧酸减水剂、HPMC、硼酸掺量分别为胶凝材料质量的0.55%、0.12%、0.10%，氧化石墨烯掺量为0.3%。此时制备的高强套筒灌浆料的56 d抗压强度达到141.62 MPa。
关键词：套筒灌浆料；结构连接；高强度；纳米材料
中图分类号：TU58+2 文献标识码：A 文章编号：1001-702X（2020）05-0050-03
Study on the preparation and performance of high strength sleeve grouting material
LUO Xiaofeng，XING Guohui，HE Yuliang
（School of Civil Engineering and Architecture，Zhejiang Industry Polytechnic College，Shaoxing 312000,China）
Abstract：The effects of water-binder ratio，mortar-sand ratio，mineral admixtures and nano-materials on the properties of high-strength sleeve grouting material were studied. The results show that as the water-binder ratio decreases and the mortar-sand ratio increases，the initial and 30-minute fluidity of the high-strength sleeve grouting material decrease，and the compressive strength of each age increases；the effect of graphene oxide to the fluidity of sleeve grouting material is the smallest，and the compressive strength is the most obvious. The optimized mix ratio of the high-strength sleeve grouting material is：the cementing material is composed of 85% cement +2% gypsum+3% fly ash +5% fine sinking beads +5% silica fume, the water-binder ratio is 0.08，and the mortar ratio is 1.86，the dosage of polycarboxylate water-reducing agent，HPMC，boric acid is 0.55%，0.12%，0.10% of the mass of the cementing material，and the graphene oxide dosage is 0.3%. At this time，the 56-day compressive strength of the prepared high-strength sleeve grouting material reached 141.62 MPa.
Key words：sleeve grouting material，structure connection，high strength，nano material