2014年2月下第43卷、第4期
D01:10.7672/sgjs2014040069
施工技术
CONSTRUCTIONTECHNOLOGY
玻化微珠保温承重泵送混凝土用水量建议算法*
王文婧，李珠，赵林
（大原理工大学建筑与土水工程学院，山西大原
030024)
【摘要】玻化微珠保温承重混凝土是一种集保温与承重为一体的新型绿色主体建筑材料，针对玻化微珠保温承重混凝土试验楼泵送试验过程中遇到的落度不稳定的间题，对24h吸水率不同的玻化微珠颗粒进行配合比试验，找出24h吸水率、落度、用水量之间的关系，对试验结果进行数据拟合，推出一种根据玻化微珠颗粒24h吸水率、设计落度来计算玻化微球保温承重混凝土用水量的算法，再根据玻化微珠24h吸水率与其堆积密度的关系，导
出基于玻化微珠堆积密度、设计落度的玻化微珠保温承重混凝土估算用水量的算法。【关键调］混凝土；玻化微珠；泵送：吸水率
【中图分类号】TU528
【文献标识码】A
【文章编号】1002-8498(2014)04-0069-03
Recommended CalculationMethod of WaterConsumption in Thermal InsulationandLoad-bearingPumpedConcrete withGlazedHollowBead
Wang Wenjing, Li Zhu, Zhao Lin
(College of Architecture & Civil Engineering, Taiyuan Unisersity of Technology, Taiyuan, Shanxi 030024, China) Abstract:Thermal insulation and load-bearing concrete with glazed hollow bead (TILB concrete)is one kind of new green main material for building, which combines thermal insulation property and load bearing function. With respect to the problem of unstable slump occurred during pumping test in experiment building of TILB concrete, this paper carried out the mix proportion tests on TILB concrete with the different 24h water absorption and found out the relations among 24h water absorption, slump and water consumption. According to the data fitting for test results, one kind of calculation method about water consumption of TILB concrete based on its 24h water absorption and design slump was deduced, so as to control slump within the required range; moreover, based on the mathematical fitting relation between 24h water absorption and stacking density of TILB concrete, one kind of simple calculation method on water consumption of TILB concrete based on its stacking density and design slump was deduced.
Key words :concrete; glazed hollow bead; pumping; water absorption
0引言
玻化微珠保温承重混凝土首次应用于晋城铭基“节能示范楼”工程中，该工程位于山西省晋城铭基风凰城小区内，短肢剪力墙结构，混凝土设计强度为C30，其外围护结构均采用玻化微珠保温承重混凝土和保温填充砌块，是一栋节能绿色型建筑[]。玻化微珠保温承重混凝土示范楼的建设把玻化微珠保温承重混凝士首次由实验室推向市场实现了玻化微珠保温承重混凝土科研成果的成功
教育部高等院校博士点基金资助：玻化微珠保温混凝土研究(20101402120007)
[【作者简介】王文婧，博士研究生，E-mail:64351338@qq.com
【收稿日期】2013-09-11 万方数据
69
转化[26]。玻化微珠保温承重混凝土作为一种新型的主体材料，采用现场搅拌、泵送的方式进行浇筑。在前期泵送试验过程中，研发人员针对轻骨料混凝土泵送中容易出现的分层、离析现象，从玻化微珠保温混凝土的原材料改善和配合比优化2方面进行了研究，提出了应用于工程实践的最优配合比，解决了玻化微珠保温承重混凝土泵送分层、离析的现象。在后期泵送试验过程中，发现混凝土落度波动较大，给现场揽拌与施工造成了一定困扰。排查过程中发现不同批次玻化微珠的影响较大，针对这种情况，对不同批次的玻化微珠颗粒24h吸水率进行了测试，并根据24h吸水率不同的玻化微珠批次设计9组配合比试验进行研究，以期找到玻化微珠