共查询到20条相似文献,搜索用时 15 毫秒
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干粉砂浆质量控制可从原材料选择、生产过程控制以及施工过程控制三个方面入手。只有合理选择原材料,恰当配比,对生产过程进行严格控制,在施工过程中严格按照施工工艺操作,才能保证粘结效果。 相似文献
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专用砌筑砂浆及注芯混凝土是混凝土小型空心砌块砌筑高层建筑的配套材料。其研制成功为混凝土小型空心砌块非框架高层建筑结构体系的开发与推广提供了必要的条件,也为混凝土空心砌块的稳步发展奠定了基础。文中介绍了专用砌筑砂浆及注芯混凝土的开发研究过程、产品性能及应用情况。指出专用砌筑砂浆及注芯混凝土不仅质量可靠、施工方便,而且成本分别比普通砌筑砂浆及商品混凝土低。 相似文献
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工业废渣混凝土多孔砖的试制 总被引:1,自引:0,他引:1
工业废渣混凝土多孔砖是指以粉煤灰、炉渣及其他废渣、水泥、各种轻集料、外加剂、水等为主要成分拌合制成的,其中,粉煤灰和各种废渣掺量不低于70%。具有节约材料资源、降低成本、方便运输的使用优点,为此介绍了该类产品的原材料技术配制与处理要求、工艺流程与生产操作控制等。 相似文献
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针对某厂新建办公区内外墙涂层出现的色差和裂纹现象,对其产生的原因进行了测量及原因分析,指出在外墙涂装过程中基层处理是外墙涂装质量及耐久性保证的重要因素,并对外墙涂料施工过程中基层的处理方法提出了一些建议,以保证外墙质量和视觉效果。 相似文献
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王武祥 《墙材革新与建筑节能》2010,(2):50-53
砌筑砂浆性能直接影响混凝土空心砌块的使用效果与施工质量,因此专用砌筑砂浆的研发、生产与应用受到广泛重视。本文研究粉煤灰对砌筑砂浆性能的影响,表明合理掺量的粉煤灰对改善砌筑砂浆稠度和保水性、提高抗压强度效果明显,对低强度等级砌筑砂浆效果更为显著;粉煤灰还赋予砌筑砂浆较高的后期强度增幅.对砌筑砂浆抗冻性和碳化性能基本没有影响。以粉煤灰为主要原料制备的混凝土空心砌块专用砌筑砂浆具有良好的施工性能、物理力学性能和耐久性,性价比高.符合发展循环经济和节能减排政策,对我国建筑砌块和砌块建筑的发展将发挥积极的推进作用. 相似文献
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《Planning》2014,(6)
采用正交试验方法,研究了水胶比、胶粉掺量、硅粉掺量以及消泡剂掺量对混凝土碳化性能的影响规律。结果表明:水胶比、胶粉掺量、硅粉掺量以及消泡剂掺量4个因素对混凝土的碳化性能影响的主次顺序是胶粉掺量最大,消泡剂掺量次之,水胶比第三,硅粉掺量最小;胶粉掺量对混凝土碳化的影响存在两个拐点,4%时混凝土的抗碳化性最差,8%时抗碳化性最好;随着消泡剂掺量的增加,碳化深度逐渐减小。最后,通过试验数据分析和查阅文献取值建立复合助剂改性混凝土的碳化模型,经游程检验,在显著性水平a=0.05下其相关关系显著。 相似文献
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中等强度自密实混凝土的碳化性能 总被引:1,自引:0,他引:1
采用快速碳化试验方法,研究了水胶比、粗骨料体积含量以及砂浆稠度等因素对中等强度自密实混凝土碳化性能的影响,分析了自密实混凝土碳化深度与其抗压强度之间的关系,并对自密实混凝土碳化寿命进行了理论预测.结果表明,水胶比、粗骨料体积含量以及砂浆稠度均对自密实混凝土的碳化性能存在不同程度的影响,自密实混凝土的碳化深度与其抗压强度之间存在显著的线性相关性,自密实混凝土碳化性能与普通混凝土相似.在合理设计和养护条件下,自密实混凝土具有足够的碳化寿命. 相似文献
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《Construction and Building Materials》2007,21(2):362-369
Various surface coatings are used to prevent the degradation of durability of concrete structures. Most of them are constituted of organic coatings using volatile organic compound. However, such organic coatings have the decisive shortcoming of being air-polluting during manufacturing process as well as during coating works. Calcium-silicate compound, an inorganic coating which exhibits composition similar to cement, is adopted to compensate this disadvantage. So far clear results are still lacking for the evaluation of durability of concrete using inorganic coating.This study intends to assess the durability of concrete applied with inorganic coating material and concrete surface treatment. The diffusivity of chloride has been evaluated using mortar specimens, and concrete specimens were used to assess the durability performance related to inorganic coating materials via carbonation test and frost resistance test.Experimental results reveal that the resistances against the penetration of chloride, freezing–thawing and carbonation are improved in the hardened mortar and concrete specimens coated with special cement coating compared to non-coated ones. Especially, cases where concrete surface treatment is applied as level III exhibit the most remarkable performances. 相似文献
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着重叙述由牡丹江市工业技术开发公司开发研制的QBZ -B1 型确必治水泥砂浆混凝土防水剂 ,应用于屋面防水工程的施工技术。这种屋面主要是采用细石混凝土掺入QBZ -B1 型水泥砂浆混凝土防水剂的方法 ,提高混凝土的密实性 ,并配合一定的构造措施 ,达到防水目的 ,这是一种刚性板块防水 ,柔性接头抗裂 ,刚柔结合的防水结构 ,解决了刚性防水屋面存在的问题 相似文献
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对钢纤维和聚丙烯纤维混杂的砂浆混凝土的弯曲性能进行了分析,探讨这种钢纤维和聚丙烯纤维混杂增强复合材料是否有较高的初裂强度和较高的韧性,试验结果表明,混杂纤维增强砂浆混凝土的弯曲性能比单一纤维增强砂浆混凝土的弯曲性能明显地得到改善,这种混杂纤维增强砂浆混凝土的复合材料性能很好地发挥出了钢纤维和聚丙烯纤维各自增强砂浆混凝土的优点。 相似文献
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介绍了环氧树脂砂浆具有附着力强、粘结强度高、耐腐蚀等特点,通过实例分析了该材料在施工中的调配及施工技术措施的要点,以提高工业建筑设备基础螺栓的锚固质量。 相似文献
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《Construction and Building Materials》2010,24(9):1594-1600
The use of industrial by-products and waste materials in concrete opens a whole new range of possibilities in the reuse of materials in the building industry. In this research study, concretes were made with chemical foundry sand (QFS) and green foundry sand (GFS) as substitution for raw sand. Also Electric arc furnace slag (EAFS) and blast furnace slag (BSF) were used as substitution for coarse raw aggregates in 25%, 50% and 100% of concrete production. Two concrete production stages were carried out. In stages 1 and 2, slump test and compressive and tensile splitting strengths and modulus of elasticity were determined. Due to adequate properties of all concretes found in stage 2, length change (during 56 weeks), sorptivity and high temperature exposure evaluation were also determined. The tests results obtained from concretes produced in stages 1 and 2 were compared with those of conventional concrete (CC) and the adequate use of the by-products for concrete production was verified. 相似文献