第十一期_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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第十一期

钢渣在建材行业中应用的定位分析

张宇，郝以党，柯国炬，刘银梅，赵蕊

２０11年第11期

摘要

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摘要：概述了钢渣的处理技术，分析了钢渣的基本特性，提出了钢渣在建材行业实现高附加值利用的方法。 Abstract: The treatment technology of steel slag is introduced, the basic characteristics of steel slag are analyzed, and the using method of high additional value for steel slag in building industry is proposed.

低碱度生态型人工鱼礁胶凝材料的初步研究

于淼，倪文，刘佳，刘立国

２０11年第11期

摘要

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摘要：利用以高炉水淬矿渣为主要原料的胶凝材料试验制作了人工鱼礁，并初步评价了人工鱼礁的实际应用效果。通过配比优化实验，最终选定材料配比为矿渣(80%)：石膏(10%)：水泥熟料(10%)：减水剂(1%)，胶砂试块3d抗压强度40MPa，28d抗压强度60MPa以上，满足人工鱼礁强度要求，同时，制作出的鱼礁海洋相容性良好，有大量水生生物附着。 Abstract：Experiment research on cementitious material made of blast furnace slag(BSF) as the major raw material to make artificial reefs is carried out, and the effect of practical application on artificial reefs is assessed. Through the optimized experiments, the finial material ratio as BFS(80%), gypsum(10%), cement (10%), water reducer(1%) is determined. The 3 days compressive strength of the specimen is 40MPa and the 28 days compressive strength up to 60MPa, which can satisfy the strength requirements of artificial reefs. Meanwhile, the reefs have well marine compatibilities and are adhered by lots of aquatic lives.

重庆大剧院SRC大悬挑大悬挂结构施工技术

岳鹏威1，刘少兵2，黄瑞华2

２０11年第11期

摘要

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摘要：以重庆大剧院工程的SRC施工实践为依托，介绍了SRC大悬挑大悬挂结构的施工工艺，包括SRC钢结构的深化设计制作、大悬挑钢骨地脚螺栓预埋方法、刚性支撑设计、安装、预拱度设置、悬挂钢结构施工、型钢骨定位安装、悬挑钢桁架吊拼安装、高强螺栓连接工艺、钢结构厚板焊接、悬挑型钢砼组合结构支架搭设等重点与难点施工工艺。 Abstract: Based on the construction practice of SRC for Chongqing Grand Theater Project, the construction technology of large overhanging and suspension structure of SRC is introduced, including the detailing design of steel structure of SRC, construction method of pre-embedded anchoring bolts for steel structure, rigid support design and installation, camber setting, construction of suspension steel structure, location and construction of steel, lifting and installation of suspension steel truss, connection craft of high-strength bolts, steel plate welding, the support of overhanging steel concrete composite structures and so on

某筏板基础大体积混凝土裂缝分析与控制

曹明莉，张聪

２０11年第11期

摘要

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摘要：以某筏板基础大体积混凝土实际工程为研究对象，采用理论计算与工程现场试验相结合的方法，分析了该筏基工程混凝土出现裂缝的原因，并结合工程实际给出了温度裂缝控制的技术措施。 Abstract: Taking one mass concrete raft foundation project as research object, using the method of theoretic calculation combining with project site tests, the reasons for the cracks of the raft foundation project are analyzed, and the technical measures on controlling thermal cracks are given combined with this project.

后张法预应力混凝土梁管道压浆料的研究

周紫晨，曾明，冯群，张冰

２０11年第11期

摘要

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摘要：对配制预应力梁管道压浆料常用的各种材料进行了对比试验，研究了各组分对压浆料工作性和膨胀性能的影响。 Abstract：The compared tests of several normal materials of pipeline grouting for prestressed concrete beam are carried out, and the influences of compositions on the workability and expansive ability of grouting are researched.

碳化对蒸压加气混凝土砌块变形和力学性能的影响

王甲春1,2，钱澄1，郑永尊1

２０11年第11期

摘要

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摘　要：通过碳化实验，测定了加气混凝土砌块在碳化条件下的收缩变形、碳化深度，碳化后加气混凝土砌块的抗压强度和抗折强度。研究结果表明：实验室碳化条件下加气混凝土砌块的收缩发展呈现三个阶段：（Ｉ）早期快速发展阶段，(II)稳定阶段，（III）加速发展阶段；表面砂浆层能够明显降低碳化收缩的发展，加气混凝土砌块碳化深度与碳化时间成正比，抗压强度和抗折强度都随着碳化的发展而下降。 Abstract: Through the carbonation experiment, the shrinkage deformation, carbonation deep, compressive strength and flexural strength of autoclaved aerated concrete blocks are measured. The results indicate that the shrinkage development of aerated concrete blocks under lab carbonation condition is divided three stages: (I) early age rapid developing stage,(II) steady stage and (III) accelerating developing stage. The surface mortar of autoclaved aerated concrete blocks can obviously decrease the carbonation shrinkage value. The carbonation deep of autoclaved aerated concrete blocks is proportional to the carbonation time, and the compressive strength and flexural strength decrease with the carbonation development.

再生混凝土柱受压性能的有限元模拟分析

王乐天1，刘煦2，刘超2，郭帅3

２０11年第11期

摘要

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摘要：通过ANSYS软件模拟了单调加载作用下不同再生骨料取代率再生混凝土柱的受压性能，得出了荷载-侧向位移关系曲线和荷载-混凝土应变关系曲线，并与相应的试验结果进行了比较分析。结果表明：有限元分析得到的破坏形态、混凝土应变及侧向位移与试验结果十分接近，验证了ANSYS分析再生混凝土受力性能的有效性。 Abstract: The load-strain curves of concrete and the load-displacement curves are carried out by ANSYS software simulating the loading capacity of recycled aggregate concrete columns with different percentage replacement of recycled coarse aggregate under monotonic loading, and the analysis results are compared with the experimental results. The results show that the failure mode, the concrete strain and the lateral displacement obtained by finite element analysis are close to the experimental results, which can verify the validity of ANSYS software to analyze the loading capacity of recycled aggregate concrete.

纤维增强型水泥基复合材料的理论发展及应用分析

陈茜，伍勇华

２０11年第11期

摘要

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摘要：介绍了纤维增强型水泥基复合材料的几种主要的理论及其发展历程，其中重点介绍了近年来兴起的具有代表性的设计型材料ECC （Engineered Cementitious Composites）的相关设计理论及其应用，并归纳总结了生产应用此类材料时存在的问题，提出了相应的解决方案。 Abstract: The development of several basic theories of designing the fiber reinforced cementitious composites is introduced, among which the method and utility of designing a new appeared representative material named ECC (Engineered Cementitious Composites）is introduced carefully. Several approaches which are supposed to solve problems encountered in experiments or production are concluded and analyze

纤维增韧水泥基复合材料拉伸性能影响因素研究

张倩茜1，袁广林1，张径伟2，田露丹1

２０11年第11期

摘要

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摘要：通过纤维增韧水泥基复合材料（ECC）单轴拉伸试验，研究了ECC的拉伸应力-应变关系曲线，分析了砂胶比、纤维类型、粉煤灰及矿渣含量等因素对ECC拉伸应变能力的影响规律。试验结果表明，ECC的拉伸应变能力对于组分及配比较为敏感，增加粉煤灰含量可有效提高ECC的拉伸应变能力；增大砂胶比及矿渣含量可以提高材料初裂强度及极限抗拉强度，但不能提高ECC的拉伸应变能力；钢纤维的掺入对于提高材料的应变硬化能力及实现多裂缝开展能力不利。 Abstract: Uniaxial tensile text has been carried out to study the tensile stress-strain relationship of engineering cementitious composites(ECC), and the influence laws of sand-binder ratio, fiber types, fly ash content and slag content on ECC’s tensile strain ability have been analyzed. Experimental results show that the tensile strain ability is sensitive to the ingredients and mixing proportions. The tensile strain ability would be improved effectively with the fly ash content increasing in general. The increase of sand-binder ratio and slag content is helpful to improve the first-crack strength and ultimate tensile strength of ECC, but it can’t improve the tensile strain ability of ECC. Moreover, adding steel fiber is disadvantageous to improve the strain-hardening ability and the development of multi-fractures of ECC

CFG桩复合地基基坑开挖新方案的探讨

王育德，李涛，米爱军

２０11年第11期

摘要

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摘要：近年来，水泥粉煤灰碎石桩（简称CFG桩）以其低成本、高承载力、方便施工等优势广泛应用于高层住宅建筑中。但CFG桩在基坑开挖过程中，如开挖方法不当会造成桩身断裂等情况，直接影响成桩的质量和施工进度。本文结合某高层建筑CFG桩复合地基基坑开挖过程中产生的断桩情况，分析了在基坑开挖过程中影响桩体断裂的不确定因素和基坑开挖过程中应注意的问题，介绍了案例工程中对这些问题的解决方案 Abstract: In recent years, cement fly ash gravel (CFG) piles with its low cost, high bearing capacity, convenient construction advantage are widely used in high-rise residential buildings. However, in the pit excavation process, pile fracture is caused by immature excavation scheme, which will directly affect the quality of piles and construction schedule. In this paper, combined with pile breaking producing in CFG piles composite foundation pit excavation process of a high-rise building, the uncertainty factors affecting the pile fracture in excavation process and the problems paid attention to the excavation process are analyzed， and the solution of these problems in the project is introduced.

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