第四期_2015_《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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第四期

建筑垃圾挂浆膜化机制对水泥砂浆性能的影响

杨子胜，王奕仁，王爱勤

２０15年第4期

摘要

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摘要：将二水石膏、胶粉、纤维素醚等原料对建筑垃圾再生砂进行膜化处理制备水泥砂浆，通过正交试验和方差分析研究了二水石膏、胶粉、纤维素醚对其性能的影响，得出了抗压强度效果最好的膜化配比为4%石膏、2%胶粉和0.6%纤维素醚，抗折强度效果最好的膜化配比为4%石膏、1%胶粉和0.2%纤维素醚，三种因素对其吸水率影响不大。试验结果表明，经膜化处理建筑垃圾制备的水泥砂浆的性能要优于未处理的建筑垃圾制备的水泥砂浆。 Abstract: The dihydrate gypsum, powder, cellulose ethers and other raw materials are used for construction waste reclaimed sand membrane treatment and preparation of cement mortar, and the effect of dihydrate gypsum, powder, cellulose ethers on performance of cement mortar is studied by the method of orthogonal level analysis and variance analysis. The results show that the membrane proportion of mortar with the best compressive strength is 4% gypsum, 2% powder and 0.6% cellulose ether, the membrane proportion of mortar with the best flexural strength is 4% gypsum, 1% powder and 0.2% cellulose ethers, three factors have little effect on its absorption. The test results show that the performance of cement mortar treated by membrane treatment is superior to that of cement mortar untreated.

激发剂对钢渣-矿粉胶凝材料力学性能的影响及机理分析

田秀淑，赵子伯，金婷艳

２０15年第4期

摘要

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摘要：研究了氢氧化钙、石膏、硫酸钠三种激发剂对钢渣-矿粉胶凝材料力学性能的影响，并结合XRD图谱分析了激发剂对钢渣-矿粉胶凝材料水化产物的影响机理。试验结果表明，三类激发剂中，硫酸钠能更好的激发钢渣-矿粉的活性，当硫酸钠的掺量为1.5%时，3d强度为18.0MPa，7d强度达到22.5MPa，28d强度达到25.8MPa。XRD分析表明，掺入硫酸钠后，钢渣-矿粉胶凝材料的水化产物主要为C-S-H凝胶、棒柱状AFt晶体及少量的Ca（OH）2晶体，激发剂掺量的不同，水化产物数量不同，合适掺量的激发剂有助于激发体系的水化活性，提高体系的力学性能。Abstract:Effectofthreekindsofactivator（calciumhydroxide,gypsumandsodiumsulfate）onthemechanicalpropertiesofsteelslag-slagpowderisstudied.HydrationproductsofthematerialsareinvestigatedbyXRD.Theresultsshowthatcomparedwiththecalciumhydroxideandgypsum,sodiumsulfatecanstimulatetheactivityofsteelslag-slagpowdermoreeffectively.WhenthecontentofNa2SO4is1.5%,3dcompressivestrengthis18.0MPa,7dcompressivestrengthis22.5MPaand28dcompressivestrengthachieves22.5MPa.XRDanalysisshowsthathydrationproductsaremainlycomposedofC-S-Hgel,AFtandCa(OH)2crystals.Theamountofhydrationproductsischangedalongwithdifferentcontentofactivators.Appropriatecontentofactivatorishelpfultothehydrationactivityofthesteelslag-slagpowdersystem,alsocanimprovethemechanicalproperties.

C30镁渣混凝土的碳化特性试验研究

李峥，崔自治

２０15年第4期

摘要

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摘要：为了实现合理利用粉煤灰、镁渣等工业废渣，提高混凝土抗碳化性能，以镁渣掺量、镁渣消解时间和粉煤灰掺量为因素，设计正交试验L9(34)方案及单因素试验方案，试验研究镁渣混凝土的碳化规律。试验表明，镁渣具有增加碱性储备和补偿收缩变形的双重效应，能显著提高C30混凝土的抗碳化性能，碳化深度与镁渣掺量呈幂指数关系，与碳化时间呈双曲线关系。镁渣和粉煤灰都是影响混凝土碳化性能的重要因素，镁渣消解时间的影响很小，是次要因素。就碳化而言，可以取消镁渣消解环节，简化镁渣混凝土的生产工艺。 Abstract: In order to realize the reasonable utilization of industrial residue such as fly ash, magnesium slag and so on and enhance the carbonation performance of concrete, taking magnesium slag content, magnesium slag digestion time and fly ash content as factors, the orthogonal test L9(34) and the single factor test scheme were designed to research the carbonization law of magnesium slag concrete. The result shows that: magnesium slag has double effects increasing alkaline reserve and compensating shrinkage deformation, and can significantly improve the carbonation performance of C30 concrete; the carbonation depth is the exponential relationship with magnesium slag content, the hyperbolic relationship with carbonization time. Magnesium slag and fly ash are important factors affecting carbonization performance of concrete. The magnesium slag digesting time which is a minor factor has little effect on carbonation. In terms of carbonization, magnesium slag digestion can be cancelled to simplify the production process of magnesium slag concrete.

无缝施工技术在沧州民防馆工程中的应用

任伟记

２０15年第4期

摘要

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摘要：概述了混凝土无缝施工技术在沧州民防工程中的应用，该工程通过设置膨胀加强带利用补偿收缩混凝土等技术，达到了理想的效果。 Abstract: The application of concrete jointless construction technology in Cangzhou civil defense engineering is summarized. And the project achieves an ideal effect by setting expansion reinforcing band and using shrinkage-compensating technology.

基于FMECA的钻孔灌注桩施工风险研究

白冰1，李平2

２０15年第4期

摘要

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摘要：FMECA方法具有数据简单、处理直接、应用潜力大等优点，故将其引入到施工风险管理中。本文选取钻孔灌注桩为例分析建筑施工风险，采用FMECA中的风险优先数方法，将风险衡量因子扩展为“发生概率”、“危害程度”和“可检测度”三个因子，对钻孔灌注桩施工风险进行半定量分析，提出更客观的防治措施，进而验证了FMECA方法在施工风险分析中的有效性。 Abstract: The FMECA method has the advantages of simple data, direct processing and great application potential, so it will be introduced to the construction risk management. Here, construction risk is analyzed by taking a bored pile as an example, and using risk priority number method of FMECA, the risk measure factor is expanded to three factors (occurrence probability, damage degree and detectability). Meanwhile, semi-quantitative analysis of construction risk of bored piles is took, more objective measures are put forward, and then verify the effectiveness of FMECA method in the construction risk analysis.

管桩模具的使用与高效修复工艺

赵瑞军

２０15年第4期

摘要

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摘要：分析了管桩模具的工作条件及损坏形式，指出了目前模具跑轮修复方法的不足，提出了利用自动堆焊设备修复管桩模具跑轮的工艺技术。研究表明，采用该工艺修复模具跑轮可大幅度提高修复效率，修复后模具的使用寿命甚至优于新模具。 Abstract：The working conditions and damage forms of the pile mould are analyzed, the shortages of the running wheel repair method for current moulds are point out, and the technology on using automatic welding equipment to repair mould running round of is put forward. The research shows that using the new technology to repair mold running wheels can greatly improve the efficiency of repair, even after repairing service life of mould is superior to that of the new mould.

JC/T 2236-2014《预应力高强混凝土桩用硅砂粉应用技术规程》标准解读

蒋元海

２０15年第4期

摘要

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摘要：简述了建材行业标准JC/T 2236-2014《预应力高强混凝土桩用硅砂粉应用技术规程》的编制背景、编制目的和意义，详细说明了标准条文的具体内容，提出了实施过程中应注意的问题。 Abstract：The compilation background, purpose and significance of building material industry standard JC/T 2236-2014 Technical specification for application of ground silica sand used for prestressed high-strength concrete piles are introduced, and the main items of the standard are explained. Meanwhile, some problems that should be paid attention to during the process of implementing the standard of JC/T 2236-2014 are put forward.

建筑干混砂浆生产线设计的规范化

秦翻萍

２０15年第4期

摘要

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摘要：针对干混砂浆生产工艺特点和行业发展现状，分析讨论了生产线总平面规划设计、生产工艺设计、建筑结构设计、环保及职业卫生设计等主要环节。提出了干混砂浆生产线设计的规范化要求和应按照我国的法律、法规、规范，实行高水平的设计、建设思路，避免大量作坊式生产线的出现是本行业健康发展的方向。 Abstract：According to the characteristics of the dry-mixed mortar production technology and industry development present situation, the main links of the production line are discussed, such as the general layout planning and design, production process design, structure design, environmental protection and occupational health and so on. It’s point out that the standardization of design requirements of the dry-mortar production line, implementation of high level design and construction in accordance with the laws, regulations and specifications of our country, and avoiding the emergence of large workshop production lines are healthy development directions of the industry.

湿法球磨改性固硫灰轻质隔墙条板的制备

孙婷1，邓跃全1，武林1，曲瑞雪2

２０15年第4期

摘要

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摘要：研究了湿法球磨固硫灰性能的变化，湿法球磨10min可使固硫灰平均粒径从5000nm下降到1800nm，硫酸钙完全转化为二水硫酸钙，能有效消除因体积膨胀引起后期安定性不良问题；探讨了固硫灰和水泥掺量对隔墙条板用水量、容重和强度的影响规律。结果表明，湿磨使固硫灰中硫酸钙溶解后重结晶成棒状、锥状晶须，利于与水泥水化产物紧密结合，形成轻质、高强材料，有较好应用前景。 Abstract: The performance changes of wet milling circulating fluidized bed combustion (CFBC) fly ash are studied. When wet milling time is 10min, the particle mean size of the CFBC fly ash decreases from 5000nm to 1800nm, calcium sulphate could be totally changed into dehydrate calcium sulphate, which effectively gets rid of the problem of later poor stability caused by dilatability. The influence laws of contents of CFBC fly ash and cement on water consumption, bulk density and strength of light weight panels for partition wall are discussed. The results show that through wet milling, calcium sulphate in the CFBC fly ash dissolves, and then crystallizes into rod or cone whisker, which was closely integrated with cement hydrates, thus those become a light weight and high strength material. The technology has a good prospect.

复合墙体热湿耦合传递模拟软件的开发与应用

宋计勇1，刘福胜1，卞汉兵2，王宏斌1，张琳1

２０15年第4期

摘要

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摘要：为快速得到复合墙体温度场及湿度场，基于热湿耦合传递理论，以Fortran语言编制了复合墙体的热湿耦合传递计算程序，并在Windows操作环境下混编VB程序和Fortran程序，开发出复合墙体热湿性能模拟软件(HMCT1.0)。该软件可对不同室内外环境参数下复合墙体温度场、湿度场进行快速计算及分析，为方便快捷的选择合适墙体组材奠定了基础，并结合实例说明其应用。 Abstract：To get the temperature field and humidity field of composite wall quickly, based on the theory of heat and moisture coupling transfer, the heat and moisture coupling transfer program of composite wall is programmed using Fortran language, the VB program and Fortran program are mixed and programmed in the windows operating system, and the simulation software of composite wall heat and moisture performance（HMCT1.0）is developed. The heat and moisture performance of composite wall in different indoor and outdoor environments can be analyzed using the software, which provides a convenient method for engineers to select the best set of wall material. In addition, the application of the software with example is illustrate.

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