【摘要】：蒸壓加氣混凝土砌塊是一種新型建材,自身表觀密度小、隔熱性能好、節(jié)能環(huán)保,并且大量使用工業(yè)廢棄物粉煤灰生產(chǎn),對環(huán)境保護有很大的貢獻(xiàn),目前很多工程使用了該種砌塊。因為該砌塊具有自身體積變形系數(shù)大、易吸水、自身強度較低等特點,由于普通砂漿與砌塊之間性能的不同,在使用時用普通砂漿與該砌塊配合砌筑的砌體容易產(chǎn)生開裂、空鼓等問題,如何有效的預(yù)防或治理上述問題尤為重要,以確保蒸壓加氣混凝土砌塊及其砌體性能的良好發(fā)揮。本文的主要研究內(nèi)容及取得的成果如下:(1)基于與蒸壓加氣混凝土砌塊性能相匹配為前提,以強度、和易性為參考指標(biāo),通過正交試驗研究與蒸壓加氣混凝土砌塊性能相匹配的專用砂漿,通過試驗,得出了強度等級為M5的專用砂漿配合比,具體為水泥、砂、粉煤灰、水的用量分別為258kg/m3、1550kg/m3、62kg/m3、279kg/m3,羥丙基甲基纖維素、引氣劑、可再分散乳膠粉的摻量分別為0.32kg/m3、0.16kg/m3、6.4kg/m3。(2)通過蒸壓加氣混凝土砌塊的單體試驗,測得了砌塊的干密度、含水率和抗凍性等性能指標(biāo)。(3)通過對蒸壓加氣混凝土砌塊砌體進行抗壓強度試驗,研究分析了砂漿灰縫厚度對砌體試件抗壓強度的影響,并對使用普通砂漿與專用砂漿砌筑的砌塊砌體進行了對比分析,提出了灰縫厚度不同的情況下蒸壓加氣混凝土砌體抗壓強度的計算公式。(4)通過對砌塊砌體進行抗剪強度試驗,研究分析了砂漿灰縫厚度對砌體抗剪強度的影響,并且提出了不同砂漿灰縫厚度情況下砌體的抗剪強度平均值的建議公式。
[Abstract]:Autoclaved aerated concrete block is a new type of building material, which has low apparent density, good thermal insulation, energy saving and environmental protection. The block is now used in many projects. Because the block has the characteristics of large volume deformation coefficient, easy water absorption and low strength, because of the difference in performance between the ordinary mortar and the block, the masonry with the ordinary mortar and the block is prone to crack when used. How to effectively prevent or control the above problems is particularly important to ensure the good performance of autoclaved aerated concrete block and its masonry. The main contents and achievements of this paper are as follows: (1) based on the premise of matching the properties of autoclaved aerated concrete blocks, the strength and easiness of concrete blocks are taken as reference indexes. The special mortar matching the performance of autoclaved aerated concrete block is studied by orthogonal test. Through the test, the special mortar mixture ratio of strength grade M5 is obtained, which is concrete cement, sand, fly ash. The dosage of water was 258kg / m ~ (3) / m ~ (3) and 1550kg / m ~ (3N) / m ~ (3) respectively, 62 kg / m ~ (32) / m ~ (3279kg / m ~ (3), and the dosage of hydroxypropyl methyl cellulose, air entraining agent, redispersible latex powder was 0.32 kg / m ~ (3o) 0.16 kg / m ~ (3) ~ (4) kg / m ~ (3.4) kg 路(2) through the monomer test of autoclaved aerated concrete block, The dry density, moisture content and frost resistance of the block were measured. (3) through the compressive strength test of autoclaved aerated concrete block masonry, the influence of mortar cement joint thickness on the compressive strength of masonry specimens was studied and analyzed. The comparison and analysis of block masonry with ordinary mortar and special mortar are also carried out. A formula for calculating the compressive strength of autoclaved aerated concrete masonry with different ash joint thickness is proposed. (4) through the shear strength test of block masonry, the influence of mortar cement joint thickness on the shear strength of masonry is studied and analyzed. The suggested formula for the average shear strength of masonry with different mortar cement joint thickness is also proposed.
【學(xué)位授予單位】：石河子大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU364

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本文編號：2426185