第三期_2011_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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第三期

清水混凝土在常州高架二期工程中的应用

汪海，张珉

２０11年第3期

摘要

引用本文

摘要：介绍了清水混凝土在常州高架二期工程中的应用。通过实际工程，具体阐述了清水混凝土的配合比设计、原材料质量控制以及施工技术要点。 Abstract: The application of fair-faced concrete in Changzhou Secondary Viaduct Project is introduced. Through practical project, the mix proportion design of fair-faced concrete, quality control of raw materials and key points of construction technology are concretely described.

超厚超长型筏形基础加强带的施工技术

龙叶天，周佳军，雷晓勤，张振兴

２０11年第3期

摘要

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摘要：超高层大型建筑目前已经成为城市建设中重要的组成部分。基于超高建筑竖向荷载较大的特点，其基础形式多采用超长超大厚度的筏形基础。而筏板基础往往因为建筑长度较长，依据相关规范要求设置多道后浇带，由此产生了大厚度、小净空、变截面的后浇带施工难题。结合成都某工程地下室筏形基础工程所采用的混凝土膨胀加强带施工技术，介绍了超厚超长大体积混凝土一次浇筑无缝施工技术，在实践中对传统后浇带的优化替代方案进行了探索。 Abstract: Currently super high-rise large buildings have become the important components in city construction. Based on the characteristic of large erect load for super high-rise buildings, raft foundation with super-long and super-large thickness is adopted to its foundation form. Because of longer building length for raft foundation, according to relevant specification, multi-channel late poured bands should be set, therefore, construction difficulties about large thickness, small clearance and variable cross-section of late poured bands are appeared. Combining with a raft foundation of basement in one Chengdu project, with the construction technique for concrete expansion reinforcing band, jointless construction for one-time-concreting to super-thick and super-long mass concrete is achieved. And optimal substitutive proposals of traditional late poured bands are explored and practiced.

低碳储能复合建筑材料制备及性能研究

谭晓倩，王立久

２０11年第3期

摘要

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摘要：在常温常压条件下，研制了一种以碱性激发剂激发矿渣、生土为基材，以吸附储能相变石蜡的膨胀珍珠岩作为轻质骨料的低碳储能复合建筑材料（LPM），其28d抗折强度和抗压强度分别可达4.95MPa、23.05MPa。测试了材料的温度随环境温度及时间变化关系以及导热性能、力学性能，同时与硅酸盐水泥 (OPC)进行了对比。结果表明：在外界温度发生变化时，此种复合建筑材料较硅酸盐水泥具有导热系数低，升温、降温速度慢，温度变化平缓、波动小的优点，且具有较好的力学性能。 Abstract: Under the normal temperature and pressure condition, a kind of low carbon emission and power storage composite building material (LPM) is prepared, which is using alkaline activated agent acting slag and clay as the substrate, and using expand perlite with adsorption and power storage phase change paraffin as light aggregate. The corresponding flexural and compressive strength can reach 4.95MPa and 23.05MPa. The variation of temperature with environment temperature and time, thermal conductivity and mechanism properties are tested, meanwhile, the LPM is contrasted to the ordinary Portland cement (OPC) as reference one. The results indicate that when the environment temperature changes, compared with the ones of OPC, the thermal conductivity of LPM is lower, the temperature rising and cooling of LPM changes more slowly and the temperature fluctuation is less. Furthermore, the mechanism properties of LPM are better than the ones of OPC.

湖南省建筑墙体自保温体系综合评价

王鹏，杨伟军，周英杰

２０11年第3期

摘要

引用本文

摘要：墙体自保温是夏热冬冷地区建筑节能工作的发展趋势，本文结合湖南省建筑节能的现状，对湖南省墙体自保温体系进行了系统的介绍和分析。通过对五种自保温墙体材料性能的介绍，对各种墙体自保温材料的特点进行了分析，并结合应用实际提出了相关建议。 Abstract：The self-thermal insulation for the wall is the trend for the work of building energy saving in the hot summer and cold winter zone. Combining with the current situation of building energy saving of Hunan Province, the systemic introduction and analysis on the system of self-thermal insulation for the wall in Hunan Province are carried out. Through the introduction of the properties of five kinds of self-thermal insulation wall materials, the characteristics of self-thermal insulation wall materials are analyzed, and according to the application practice, the relevant suggestions are offered.

现浇混凝土CBM内模空心楼盖的施工实践

王潇洲

２０11年第3期

摘要

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摘要：现浇混凝土CBM自稳型内模空心楼盖具有轻质高强、抗振动性能及保温隔音性能好的优点，而且施工方便，经济实用。工程实践表明，抗浮是混凝土空心楼盖施工的关键技术，施工过程中只要加强对CBM管安装固定、混凝土浇筑等关键工序的质量控制，空心楼盖施工质量就可以得到有效保障。Abstract:Theself-stabilizationCBMtubesincast-in-placeconcreteofhollowfloorhavetheadvantagesoflightweight,highstrength,anti-vibration,heatpreservationandgoodsoundproofperformance,furthermore,itiseasytobeconstructed,economicalandpractical.Theengineeringpracticeprovesthatanti-floatingisakeytechniqueinconstructionofcast-in-placeconcreteofhollowfloor,andthequalityofhollowfloorwillbeeffectivelyguaranteedaslongasthequalitycontrolofthekeyprogramssuchasthefirm-installmentofCBMtubesandtheprocessofpouringconcrete,isstrengthened.

混凝土砌块砌体剪压作用下抗剪强度公式研究

张潞1，宋力2

２０11年第3期

摘要

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摘要：通过对主拉应力破坏理论和库仑破坏理论及墙体抗剪时的三种破坏形态的分析，研究了混凝土砌块砌体在剪压复合受力下抗剪强度计算方法，建立了混凝土砌块砌体抗剪强度公式。 Abstract: The shear strength computational methods of concrete block masonry under shear-compression loading are studied based on the analysis of the maximum tensile stress theory, the classic Coulomb friction law and the three kinds of failure models of the wall against shearing. And the shear strength formula of concrete block masonry is established.

水镁石纤维路面混凝土性能影响因素的灰关联熵分析

张晓旭1，仇玉良1，刘开平2，关博文2

２０11年第3期

摘要

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摘要：通过强度试验，运用灰关联熵的系统分析方法，分析了水灰比、纤维长径比、纤维掺量、减水剂掺量，坍落度等因素对路面混凝土28d抗弯拉强度和压折比影响的主次关系和影响程度。分析表明，对于水镁石纤维路面混凝土，水灰比是一个非常重要的参数；水镁石纤维的长径比及掺量也是混凝土强度的重要因素。结果证明，在水泥混凝土多因素的分析中，灰关联熵法是一种简单实用且结果比较准确的方法，其结论可为水镁石混凝土配合比设计参数提供有效的计算依据。 Abstract：Through the compressive strength test, the major and minor relationship and effects of the factors of water-cement ratio, length-diameter ratio of brucite fiber, dosage of fiber, dosage of water reducer and slump on 28d flexural strength and ratio of compressive strength to flexural strength of pavement concrete are analyzed by using systematic analysis method of grey relation entropy. The results indicate that for brucite fiber reinforced pavement concrete, the water-cement ratio is a very important parameter, the length-diameter ratio and the dosage of brucite fiber are also the important factors affecting the strength of concrete. The results prove that in the multifactor analysis for cement concrete, the gray relation entropy method is a kind of simple, practical and resulting accurate method, and the conclusion can provide a valid calculation basis for design parameter of mix proportion of brucite concrete.

严寒地区聚丙烯纤维砂浆应用于陶粒混凝土墙体抗裂的性能研究

吕春1，刘杰2

２０11年第3期

摘要

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摘要：针对严寒地区陶粒混凝土砌块墙体极易产生裂缝的现状，在墙体饰面砂浆中掺加聚丙烯纤维以改善砂浆的抗裂性能。试验研究了聚丙烯纤维长度及掺量对陶粒混凝土砌块墙体饰面砂浆的抗压、抗折、抗裂性能的影响。结果表明，聚丙烯纤维的最佳长度为15mm，最佳掺量为0.15%～0.20%。Abstract:Forthestatusofceramicconcreteblockwallcausingcrackseasilyincoldareas, thecrackresistanceofmortarcanbeimprovedbyaddingthepolypropylenefiberinthewallfacingmortar.Theeffectsofthelengthanddosageofpolypropylenefiberoncompressivestrength,flexuralstrengthandcrackresistanceoffacingmortarinceramicconcreteblockwallareresearchedbyexperiment.Theresultsshowthattheoptimumlengthofpolypropylenefiberis15mm,andtheoptimumdosageis0.15%～0.20%.

玄武岩纤维增强、阻裂性能的试验研究

何军拥1,2，黄小清1，田承宇3

２０11年第3期

摘要

引用本文

摘要：试验研究了不同掺量的玄武岩纤维对高性能混凝土和易性、抗压强度、抗折强度和抗拉强度的影响。结果发现，掺入玄武岩纤维后，混凝土的坍落度略有降低，但粘聚性能和保水性大大提高，且7d抗压强度和28d抗折强度明显提高。试验结果还表明，在水泥砂浆中掺入乱向短切玄武岩纤维后，其强度及抗裂性能均得到改善。此外，在低掺量情况下，玄武岩纤维与聚丙烯纤维对混凝土增强、增韧性能的影响基本一致。 Abstract：The effects of different dosages of basaltic fiber on workability, compressive strength, flexural strength and tensile strength of high performance concrete are researched by experiment. The results indicate that after adding basaltic fiber, the slump of concrete is slightly decreased, but cohesion properties and water retention are greatly increased. 7d compressive strength and 28d flexual strength are obviously increased. Experimental results also show that after adding random short-cut basaltic fiber into cement mortar, the strength and crack resistance of mortar are both improved. Besides, under the situation of low dosage, the influences of basaltic fiber on reinforcing and toughening performances of concrete are basically identical with the influences of polypropylene fiber.

用组合模型预测软土地基桩基沉降

丁斌

２０11年第3期

摘要

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摘要：结合温州地区某桩基工程实测沉降数据，以多元回归分析模型、时间序列分析模型及GM（1，1）灰色理论模型为组合模型的子模型，经大量数据的演算，探讨了不同组合模型建模方案在对历史数据的拟合及未知数据的预测上的不同特点，总结了各种组合模型的一般规律及其适用性 Abstract：Combining with the actually monitoring settlement data of one pile foundation project in Wenzhou district, using multivariate regression analysis model, time-series analysis model and grey theory model GM(1,1) as the submodel of combined models, the different characteristics of historical data fitting and unknown data forecasting made by different modeling scheme of combined models are discussed according to a lot of calculus of data, and the general law and its applicability are summarized for the different combined models.

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