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The consolidation behavior of mixed in place cement- and lime/cement-mixed column was studied. Consolidation of the composite
foundation was modeled as a three-dimensional axi-symmetric problem. The authors used the finite difference method to obtain
the pore pressure variation with time at any location below the surface. A computer program developed by the authors was used
to draw some interesting conclusions about the consolidation behaviors of cement- and lime/cement-mixed pile foundation. Finally,
a combined model including the permeability coefficients of cement-mixed piles and soil, was studied and its feasibility was
evaluated.
Project supported by National Natural Science Foundation of China (No. 59908012) and Education Ministry of China 相似文献
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通过用白灰做胶凝剂的成型材料,控制反应温度在4℃-128℃的范围内,来捕集烟道气中低浓度的二氧化碳、二氧化硫、二氧化氮、一氧化氮,并将其固存在成型材料中,使二氧化碳、二氧化硫矿化成为产品的组成部分,得到多种早强的白灰气硬性产成品,并由此得到二氧化碳、二氧化硫、二氧化氮、一氧化氮枯竭的烟道气。其主要用途是:可用于燃煤发电厂的二氧化碳、二氧化硫、二氧化氮、一氧化氮的减排,并使其固体排放物得到综合利用,得到早强的白灰成型材料产成品。 相似文献
3.
秦文斌 《福建工程学院学报》2020,(2):139-143
闽王祠灰塑与彩绘艺术是福州传统祠堂装饰的典型案例。它饰域完整、工艺丰富,展示了传统建筑装饰工艺的审美特色;题材鲜明、表意通俗,体现了闽东祠堂装饰文化儒释道三教合一的典型特征;造型秀逸、格调清丽,充溢着“海滨邹鲁”的福州人文底蕴和闽东独特的海洋文化气息。闽王祠灰塑与彩绘艺术的造型语言和审美样式丰富了福州祠堂文化的审美内容,同时也为闽东灰塑彩绘传统工艺的传承与发展提供了有益的文化审美支撑。 相似文献
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以工业废渣钡渣为水处理剂,研究钡渣对水中磷去除率的影响,进水含磷10 mg/L,钡渣投加量5 g,处理时间90 min,pH为11时,去除率达81.9%.实验表明,钡渣与氢氧化钙协同作用去除水中磷时,去除率高于钡渣或氢氧化钙单独作用的处理效果.投加比例为(钡渣1 g+氢氧化钙1.5 g)/1 mg磷,水中磷的去除率达到90.42%,出水含磷量已经降低到1 mg/L以下,达到国家排放标准.去除率随着pH提高而增加. 相似文献
6.
Lime, which is a frequently used activating agent of fly ash （FA）, has two main states： slaked lime and quick lime. We studied the effects of slaked lime and quick lime on activating FA, and discussed their kinetics. The results show that slaked lime is more beneficial for activating FA than quick lime given the condition of equivalent CaO amount. The use of slaked lime has superiority in technology and economy on activating FA. Theoretical analysis revealed that the kinetic constant of the activation reaction using slaked lime is higher than using quick lime, credited to the better volume stability and fineness, and smaller water demand of slaked lime. 相似文献
7.
Lidia Armelao Arianna Bassan Renzo Bertoncello Guido Biscontin Sergio Daolio Antonella Glisenti 《Journal of Cultural Heritage》2000,1(4)
The study of the interaction between silica glass and saturated Ca(OH)2 solutions can be a useful approach to resolve the problem of the adhesion between lime-sand mortar and clay bricks. Since it is reasonable that the silica–calcium hydroxide system well simulates a brick–mortar system, experimental observations concerning the interaction of silica glass and this strong basic solution should be of value for the comprehension of the chemical reactions that could take place at the mortar–brick interface, maybe affecting the adhesion between the two building materials. We demonstrated the effects of saturated Ca(OH)2 solutions on commercial pure silica glass (fused silica) and on silica films obtained via a sol–gel process by means of dip-coating. Silica samples were dipped in the solutions at different temperatures (room temperature, 60 and 80 °C) and at different time intervals (1 and 21 h) and then they were analysed by means of surface techniques: X-ray photoelectron spectroscopy (XPS), secondary ion mass spectrometry (SIMS) and atomic force microscopy (AFM). It has been shown that Ca(OH)2 reacts with the silica glass network. The experimental results clearly show a very different behaviour of sol–gel silica with respect to fused silica, probably because of their different nanostructure. Many problems concerning the interaction of silica and Ca(OH)2 are still to be solved, but the results of this research strengthen the idea that adhesion between lime-sand mortar and clay bricks is caused not only by carbonation of calcium hydroxide contained in the mortar, but even by some chemical reactions involving the brick constituents and calcium hydroxide itself. The final products, calcium silicates, may induce a chemical continuity between lime-sand mortar and clay bricks. 相似文献
8.
许海玲 《襄樊职业技术学院学报》2004,3(6):25-28
混凝土的质量是影响混凝土结构可靠性的一个重要因素，为保证结构的可靠，必须在施工过程的各个工序对原材料、混凝土拌和物及硬化后的混凝土进行必要的质量检验和控制。分析了影响混凝土质量问题的主要因素，探讨保证其质量的方法，对混凝土的质量控制进行了较为详细的剖析。 相似文献
9.
盐渍蘑菇脱盐技术的研究 总被引：2，自引：0，他引：2
何弥尔 《昆明师范高等专科学校学报》2000,22(4):23-25
针对传统清水处理脱盐法的缺点,根据不同离子通透性有差异,以酸碱理论等原理研究了“盐渍蘑菇脱盐技术”。 相似文献
10.
阐述了二灰稳定碎石混合料的施工特点和要点，提出了硫酸钠掺量的控制方法和检验方法，以及连续拌和机施工条件下对混合料配合比的检验方法。 相似文献