体积膨胀法测量加气混凝土开孔隙度的研究

发布时间：2018-01-24 22:51

本文关键词： 加气混凝土开孔隙度体积膨胀法　出处：《新型建筑材料》2017年04期 　论文类型：期刊论文

【摘要】：采用体积膨胀法测量加气混凝土砌块的开孔隙度,研究了测量压力、样品尺寸等对开孔隙度的影响,以及其它实验操作条件及参数的选择。结果表明:加气混凝土砌块不同位置开孔隙度存在差异,离散系数在0.3%~0.4%之间;开孔隙度与实验压力呈显著负相关,但压力的影响小于位置差异的影响,综合考虑误差和实验耗时等因素,选择60 k Pa作为实验压力进行开孔隙度测量;切割对开孔隙度测量值的影响较小,这有利于证明小样品的开孔隙度测量值可以代表砌块本身。建立的体积膨胀法可以高效、准确地测量加气混凝土的开孔隙度。
[Abstract]:The open porosity of aerated concrete block was measured by volume expansion method, and the influence of pressure and sample size on the porosity was studied. The results show that the porosity of aerated concrete blocks is different at different locations, and the dispersion coefficient is between 0.3% and 0.4%. The porosity is negatively correlated with experimental pressure, but the influence of pressure is less than that of location difference. The factors such as error and experimental time are considered comprehensively. 60 KPA is chosen as the experimental pressure to measure the porosity. The effect of cutting on the measurement value of porosity is small, which is helpful to prove that the measurement value of porosity of small sample can represent the block itself, and the volume expansion method established can be efficient. Accurately measure the opening porosity of aerated concrete.
【作者单位】：清华大学工程物理系;中国建筑材料检测认证中心有限公司;中国疾病预防控制中心辐射防护与核安全医学所;
【基金】：国家自然科学基金项目(11375164、41273101)
【分类号】：TU522.32
【正文快照】： 加气混凝土是一种多孔多相的非均质材料,由于其轻质多孔、保温隔热、工业固体废弃物利用率高等特点,已作为新型墙体材料得到广泛应用[1-3]。多孔性是加气混凝土与普通混凝土最突出的表观差异之一,同时又是影响其抗压强度[4]、隔声效果[5]、氡析出[6]的重要因素。开孔隙度是指

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