第十期_2020_《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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第十期

粉煤灰对混凝土耐久性的影响研究 ——评《粉煤灰混凝土的耐久性》

孙红军

2020年第10期

摘要

引用本文

我国在建筑施工行业每年需要消耗大量的水泥，而生产水泥需要消耗大量的资源。粉煤灰是燃煤发电产生的废弃物，若不能充分利用，粉煤灰的堆积会带来环境污染。为了提高粉煤灰的利用率，解决上述资源与环境的难题，鲁丽华等人编著的《粉煤灰混凝土的耐久性》一书。笔者通过对该书的学习，认为该书从背景概述到试验研究，再到结论分析，从不同角度分析了在冻融循环、腐蚀环境下粉煤灰混凝土及粉煤灰钢筋混凝土构件各项性能的发展规律，现简要总结如下。

孙红军.粉煤灰对混凝土耐久性的影响研究——评《粉煤灰混凝土的耐久性》[J].混凝土与水泥制品,2020(10):96.

珊瑚-水泥复合胶凝材料性能研究及微观分析

王卓蕾1,2，谢建斌1,3，刘思楠1，张文豪1，赵一锦1

2020年第10期

摘要

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摘要：以10%、20%、30%的珊瑚粉等质量取代水泥制备珊瑚-水泥复合胶凝材料，研究了珊瑚粉对水泥胶凝材料标准稠度用水量、凝结时间、水化放热量、胶砂强度、电阻率和吸波性能的影响，并用XRD、SEM方法分析了珊瑚-水泥复合胶凝材料的物相和微观形貌。结果表明：珊瑚粉会使水泥胶凝材料的凝结时间延长，水化放热量减少，对标准稠度用水量影响不明显；珊瑚粉对水泥胶凝材料的力学性能不利，但仍能满足工程建设要求；掺入珊瑚粉后，试件的电阻率下降、导电性能增加、吸波性能降低；珊瑚-水泥复合胶凝材料的主要水化产物与水泥胶凝材料类似，没有新产物生成。 Abstract: Coral-cement composite cementitious materials were prepared by replacing cement with 10%, 20% and 30% coral powder. The effects of coral powder on water consumption of standard consistency, setting time, hydration heat, flexural strength and compressive strength, resistivity and wave absorbing performance of cement cementitious materials were studied. XRD and SEM were used to analyze the phase and microstructure of coral-cement composite cementitious materials. The results show that coral powder prolongs the setting time of cement cementitious materials, reduces the hydration heat, and has no obvious influence on water consumption of standard consistency. Coral powder is unfavorable to the mechanical properties of cement cementitious materials, but it can still meet the needs of engineering construction. After adding coral powder, the resistivity of the specimens decreases, the conductivity increases, and the wave absorbing performance decreases. The main hydration products of coral-cement composite cementitious materials are similar to cement cementitious materials, without new products.

王卓蕾,谢建斌,刘思楠,等.珊瑚-水泥复合胶凝材料性能研究及微观分析[J].混凝土与水泥制品,2020(10):87-90,95. WANG Z L,XIE J B,LIU S N,et al.Study on Properties and Microanalysis of Coral-cement Composite Cementitious Materials[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):87-90,95.

超硫酸盐水泥植生多孔混凝土性能试验研究

黄劲，秦节发，陈超，石华，谭建湘，任政

2020年第10期

摘要

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摘要：选用一种低碱度超硫酸盐水泥制备了多孔混凝土，研究了不同掺量脱硫石膏对多孔混凝土pH值和力学性能的影响，分析了狗牙根、高羊茅、早熟禾、黑麦草和白喜草在多孔混凝土中的植生情况。结果表明：当脱硫石膏掺量为15%～20%，P·O 52.5水泥掺量为5%时，多孔混凝土的抗压强度最高；水胶比为0.3时，多孔混凝土的施工性和力学性能最优；脱硫石膏、P·O 52.5水泥和水胶比对多孔混凝土的pH值影响较小。制备的多孔混凝土pH值较低，能够满足植物生长需求，其中，高羊茅和白喜草在多孔混凝土中的植生性能最佳。 Abstract: The super sulfate cement with low alkalinity was selected to prepare the eco-porous concrete, the effects of different content of desulfurization gypsum on the pH value and mechanical properties of eco-porous concrete were studied, and the planting performance of bermudagrass, tall fescue, kentucky bluegrass, ryegrass and bahia grass in eco-porous concrete was analyzed. The results show that the compressive strength of eco-porous concrete is the highest when the content of desulfurized gypsum is 15%~20% and the content of P·O 52.5 cement is 5%. When the water-binder ratio is 0.30, the workability and mechanical properties of eco-porous concrete are optimal. The content of desulfurized gypsum, P·O 52.5 cement and water-binder ratio have little influence on the pH value of eco-porous concrete. The prepared eco-porous concrete has a low pH value and can meet the needs of plant growth. Among them, tall fescue and bahia grass have the best planting performance in eco-porous concrete.

黄劲,秦节发,陈超,等.超硫酸盐水泥植生多孔混凝土性能试验研究[J].混凝土与水泥制品,2020(10):91-95. HUANG J,QIN J F,CHEN C,et al.Experimental Study on the Performance of Super Sulphated Cement Eco-porous Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):91-95.

混凝土回弹仪（2.207J）分段率定计量研究

魏超琪1，王磊2，张鹏1，赵庆航1，贺晶晶3

2020年第10期

摘要

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摘要：研究了混凝土回弹仪钢砧率定值与其硬度及质量间的关系，确定了一款比较适合中型回弹仪用的轻型钢砧（率定值为40±1）。结果表明：该轻型钢砧可有效提升回弹仪检定周期内常用示值区间段回弹值的重复性、稳定性和准确性，同时，可确保回弹仪的使用过程处于标准状态，进而提高回弹法检测混凝土抗压强度的精度。 Abstract: Based on the study of the relationship between the setting value of steel anvil and its hardness and weight, a light steel anvil with the setting value of 40±1 was determined. The results show that the light steel anvil can effectively improve the repeatability, stability and accuracy of the rebound value of commonly used indication interval in the verification cycle of the rebound instrument. In addition, it can ensure that the use process of the rebound instrument is in a standard state, thereby improving the accuracy of the rebound method for testing the compressive strength of concrete.

魏超琪,王磊,张鹏,等.混凝土回弹仪（2.207J）分段率定计量研究[J].混凝土与水泥制品,2020(10):83-86. WEI C Q,WANG L,ZHANG P,et al.Research on the Section Calibration and Measurement of Concrete Rebound Instrument(2.207J)[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):83-86.

热重分析法在混凝土碳化深度检测中的应用

李蓓1,2，金南国2，田野2，金贤玉2，李鑫燚1

2020年第10期

摘要

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摘要：针对现有酚酞试剂法无法精确测定混凝土碳化程度的不足，基于热重法定量分析CaCO3含量的试验原理，利用TA-Q500热重分析仪在原材料相同的条件下对不同水灰比及龄期条件下的混凝土碳化深度进行了检测，并阐述了该方法的具体操作步骤。结果表明：与酚酞试剂法相比，热重分析法可以定量分析碳化混凝土中的Ca(OH)2 和CaCO3含量，具有快速、方便的特点，且受环境和人为因素的影响较小，测试结果相对稳定准确。 Abstract: In view of the phenolphthalein method cannot accurately measure the concrete carbonation degree, based on the experimental principle of quantitative analysis of CaCO3 content by thermogravimetric method, the carbonation depth of concrete under different water cement ratio and age conditions was tested by TA-Q500 thermogravimetry analyzer under the same raw materials, and the specific operation steps of the method were described. The results show that compared with the phenolphthalein reagent method, the thermogravimetry method can quantitatively analyze the content of Ca(OH)2 and CaCO3 in carbonated concrete, which has the characteristics of rapidity and convenience, and is less affected by the environment and human factors, and the test results are relatively stable and accurate.

李蓓,金南国,田野,等.热重分析法在混凝土碳化深度检测中的应用[J].混凝土与水泥制品,2020(10):80-82,86. LI B,JIN N G,TIAN Y,et al.Application of Thermogravimetric Analysis Method in Detecting Carbonation Depth of Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):80-82,86.

新旧混凝土叠合面抗剪性能研究

陈甫亮1，胥卉2,廖桢颖1，王韶纤2,李俊杰1，陈俊2

2020年第10期

摘要

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摘要：新旧混凝土叠合面的剪切强度是衡量界面黏结性能的最重要指标。基于Z形黏结试件剪切试验，研究了不同叠合层材料、不同界面处理方式、不同槽口形式下的叠合界面抗剪性能。结果表明，UHPC试件表现出较好的界面抗剪能力，其承载力均高于自密实试件。对于槽口构件，槽口连接形式能提高叠合面抗剪承载力，其中梯形槽口对界面抗剪承载力提升效果更为显著。槽口形式对UHPC材料与C30混凝土界面抗剪能力的影响相较于其对自密实材料与C30混凝土界面抗剪能力的影响更为显著。对于有锚固钢筋的试件，增大锚固钢筋的锚固长度可以提高UHPC材料与C30混凝土界面抗剪能力；对于无锚固钢筋无槽口试件，气泡纸粗糙面处理可以改善UHPC试件的变形能力。 Abstract: The shear strength of old and new concrete combined interface is the most important index to measure the interfacial bonding property. Based on the shear test of z-shaped bonding specimens, the shear resistance of composite interface with different laminated materials, different interface treatment methods and different notches was studied. The results show that the UHPC specimens exhibit good interface shear resistance and their bearing capacity is higher than that of self-compacting specimens. For the notched specimens, the notched joint can improve the shear strength of the composite surface, among which the trapezoidal notched joint has more significant effect on the shear strength of the interface. The influence of notch form on the shear resistance of UHPC material and C30 concrete interface is more significant than that of self-compacting material and C30 concrete interface. For the specimens with anchorage reinforcement, increasing the anchorage length of the anchorage reinforcement can improve the shear resistance of the interface between UHPC material and C30 concrete. For non-anchorage steel bar notched specimens, bubble paper rough surface treatment can improve the deformation capacity of UHPC specimens.

陈甫亮,胥卉,廖桢颖,等.新旧混凝土叠合面抗剪性能研究[J].混凝土与水泥制品,2020(10):75-79. CHEN F L,XU H,LIAO Z Y,et al.Research on the Shear Resistance of Combined Interface of New and Old Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):75-79.

灰缝厚度对蒸压加气混凝土砌块墙体热工性能的影响

肖力光，邢纹浩

2020年第10期

摘要

引用本文

摘要：基于Ansys Workbench热力学模块对蒸压加气混凝土外墙传热模式进行了分析，并对研究单元进行建模，确定了模型边界条件及荷载加载形式。通过对3 mm、20 mm等不同厚度砌筑灰缝进行建模研究，探讨了不同灰缝厚度情况下，蒸压加气混凝土砌块墙体温度的分布情况。结果表明，薄灰缝砌筑可以显著减少蒸压加气混凝土砌块墙体的“微热桥效应”，从而降低墙体热量流失。灰缝散失的热量占墙体总散失热量百分比y与灰缝厚度x的关系为：y=0.946x+3.247。 Abstract: Based on the thermodynamics module of Ansys Workbench, the heat transfer mode of the outer wall of autoclaved aerated concrete was analyzed, and the research unit was modeled to determine the boundary conditions of the model and the form of load loading. Through the modeling study of masonry mortar joints with different thickness such as 3 mm and 20 mm, the temperature distribution of autoclaved aerated concrete block walls with different thickness of mortar joints was discussed. The results show that the thin mortar joint masonry mortar plays a positive role in reducing the "micro-thermal bridge effect" of autoclaved aerated concrete block wall and reducing the heat loss of wall. The relationship between the ratio of heat loss from ash joints to total heat loss from wall(y) and the thickness of mortar joints (x) is y=0.946x+3.247.

肖力光,邢纹浩.灰缝厚度对蒸压加气混凝土砌块墙体热工性能的影响[J].混凝土与水泥制品,2020(10):72-74,79. XIAO L G,XING W H.Effect of Different Thickness Mortar Joints on Thermal Performance of Autoclaved Aerated Concrete Block Wall[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):72-74,79.

预制夹心混凝土墙板热工性能研究

张佳阳，路国忠，郭振雷，尹志芳

2020年第10期

摘要

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摘要：通过研究不同种类及厚度的夹心保温材料、拉结件布置数量及保温板缝隙宽度，分析了其对预制夹心混凝土墙板传热系数的影响。结果表明：夹心层保温材料导热系数越小、夹心层越厚，预制夹心混凝土墙板传热系数越小；非金属拉结件对夹心墙板传热系数的影响约为1.3%～3.2%，夹心层厚度越厚，墙板传热系数越小，拉结件影响越大；夹心层保温板采用定制式保温板可有效降低保温板缝隙对预制墙板传热系数的影响，计算结果可为预制夹心墙板的热工设计提供依据。 Abstract: By studying the sandwich insulation layer of different types and thicknesses, the number of connectors and the gaps of insulation boards, the effects of the heat transfer coefficient on prefabricated concrete sandwich wallboard were analyzed. The results show that the lower thermal conductivity and the thicker the sandwich insulation layer, the smaller the heat transfer coefficient of prefabricated concrete sandwich wallboard. The effect of non-metallic connectors on the heat transfer coefficient of the sandwich wallboard is about 1.3%~3.2%, and the thicker sandwich insulation layer, the samller the heat transfer coefficient of the sandwich wallboard, and the greater the influence of connectors. Customized sandwich wallboard, which can effectively reduce the effect of insulation board gap on the heat transfer coefficient of prefabricated sandwich wallboard. The calculation results can provide an evidence for the thermal design of prefabricated sandwich wallboard.

张佳阳,路国忠,郭振雷,等.预制夹心混凝土墙板热工性能研究[J].混凝土与水泥制品,2020(10):69-71. ZHANG J Y,LU G Z,GUO Z L,et al.Study on Thermal Performance of Prefabricated Concrete Sandwich Wallboard[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):69-71.

高性能轻质混凝土复合外墙围护部品研究与应用

孙源泽1，蒋勤俭1，刘昊2，吕丽萍2，黄清杰1

2020年第10期

摘要

引用本文

摘要：装配式钢结构住宅建筑正逐渐成为我国装配式建筑的重要组成部分，其外墙围护部品很难同时满足轻质、防水、防火、耐久以及与门窗、保温集成一体等高性能要求，限制了其快速、高质量发展。为解决钢结构住宅外墙围护部品性能不高的问题，通过研究外墙围护部品的材料、墙板、配件以及建筑、结构设计等，研发了一种满足钢结构住宅高性能要求的轻质混凝土复合外墙围护部品，并成功应用到了相应的工程中。 Abstract: The prefabricated steel structure residential buildings are gradually becoming an important part of prefabricated buildings in China. However, it is difficult to meet all high requirements of lightweight, waterproofing, fire prevention, durability and integration with doors, windows and insulating layer, which limits the rapid and high-quality development of steel structure residential buildings. In order to solve the problems of low performance, through studying the materials, accessories, construction and structural design of external wall enclosure components, a new lightweight concrete composite exterior wall enclosure component that meets the high performance requirements of steel structure residential buildings is developed, and successfully applied to corresponding projects.

孙源泽,蒋勤俭,刘昊,等.高性能轻质混凝土复合外墙围护部品研究与应用[J].混凝土与水泥制品,2020(10):65-68. SUN Y Z,JIANG Q J,LIU H,et al.Research and Application of High Performance Lightweight Concrete Composite Exterior Wall Enclosure Components[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):65-68.

高温后玄武岩纤维混凝土力学性能试验研究

李曈1，张晓东1，刘华新1，陈明2，范锦泽1，陈晨1

2020年第10期

摘要

引用本文

摘要：研究了高温作用下素混凝土、玄武岩纤维混凝土、玄武岩-高吸水树脂混凝土及玄武岩-纤维素混杂纤维混凝土的力学性能，建立了高温作用后混凝土的抗压强度预测模型。结果表明：纤维的掺入能够提高混凝土的耐高温性能；对于抗压强度，玄武岩-纤维素混杂纤维混凝土的抗压强度值最高，400 ℃时，其抗压强度相较素混凝土提高了36.3%；对于抗折强度，玄武岩和高吸水树脂混掺对混凝土抗折强度的提升效果最优；建立的高温作用下混凝土抗压强度预测模型的精度较高。 Abstract： The mechanical properties of plain concrete, basalt fiber concrete, basalt-superabsorbent resin concrete and basalt-cellulose hybrid fiber concrete after high temperature were studied, and the prediction models of compressive strength of concrete after high temperature were established. The results show that the addition of fiber can effectively improve the high temperature resistance of concrete. For compressive strength, the basalt-cellulose hybrid fiber concrete has the highest compressive strength, and at 400 ℃, its compressive strength is 36.3% higher than that of plain concrete. For flexural strength, the mixing of basalt and superabsorbent resin has the best effect on the improvement of the flexural strength of concrete. The established prediction models of compressive strength of concrete under high temperature have high accuracy.

李曈,张晓东,刘华新,等.高温后玄武岩纤维混凝土力学性能试验研究[J].混凝土与水泥制品,2020(10):61-64. LI T,ZHANG X D,LIU H X,et al.Experimental Study on Mechanical Properties of Basalt Fiber Concrete After High Temperature[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):61-64.

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