本文關(guān)鍵詞： 加氣混凝土 開孔隙度 體積膨脹法　出處：《新型建筑材料》2017年04期 　論文類型：期刊論文

【摘要】：采用體積膨脹法測量加氣混凝土砌塊的開孔隙度,研究了測量壓力、樣品尺寸等對開孔隙度的影響,以及其它實驗操作條件及參數(shù)的選擇。結(jié)果表明:加氣混凝土砌塊不同位置開孔隙度存在差異,離散系數(shù)在0.3%~0.4%之間;開孔隙度與實驗壓力呈顯著負(fù)相關(guān),但壓力的影響小于位置差異的影響,綜合考慮誤差和實驗耗時等因素,選擇60 k Pa作為實驗壓力進(jìn)行開孔隙度測量;切割對開孔隙度測量值的影響較小,這有利于證明小樣品的開孔隙度測量值可以代表砌塊本身。建立的體積膨脹法可以高效、準(zhǔn)確地測量加氣混凝土的開孔隙度。
[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.
【作者單位】： 清華大學(xué)工程物理系;中國建筑材料檢測認(rèn)證中心有限公司;中國疾病預(yù)防控制中心輻射防護(hù)與核安全醫(yī)學(xué)所;
【基金】：國家自然科學(xué)基金項目(11375164、41273101)
【分類號】：TU522.32
【正文快照】： 加氣混凝土是一種多孔多相的非均質(zhì)材料,由于其輕質(zhì)多孔、保溫隔熱、工業(yè)固體廢棄物利用率高等特點,已作為新型墻體材料得到廣泛應(yīng)用[1-3]。多孔性是加氣混凝土與普通混凝土最突出的表觀差異之一,同時又是影響其抗壓強度[4]、隔聲效果[5]、氡析出[6]的重要因素。開孔隙度是指

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