混凝土研究_2021_《混凝土与水泥制品》杂志社

头部文案

发布时间：2020-01-06 00:00:00

全国建材科技期刊
全国中文核心期刊
中国科技论文统计源期刊
万方数据-数字化期刊群入网期刊
中国学术期刊（光盘版）全文收录期刊

华东地区优秀科技期刊
江苏省期刊方阵“双效期刊”
中国期刊网全文收录期刊
中国科技期刊数据库全文收录期刊



全部文章

混凝土研究

复合掺合料对水泥胶砂流动度和长期强度的影响

蒋鹤1，李树繁1，王小明1，高超2,3，周永祥2,3，周郅人2,3

2021年第1期

摘要

引用本文

摘要：采用粉煤灰（F）、矿渣粉（Sl）、硅灰（Si）和石灰石粉（L）复合组成5种复合矿物掺合料，研究了复合掺合料的组成和掺量对水泥胶砂流动度、长期抗压强度和抗折强度的影响。结果表明：掺粉煤灰和石灰石粉的FSlL和FL复合掺合料流动性较好，流动度比达到110%以上；掺硅灰的FSlSi和SlSiL复合掺合料流动性较差，流动度比在80%左右；5种复合掺合料在30%、40%、50%掺量下，胶砂试件720 d抗压强度和抗折强度均达到纯水泥试件的110%~120%；FSlSi、FSl和FL复合掺合料随着掺量的提高，长龄期胶砂抗压强度有所增加，抗折强度发展趋势与抗压强度相同；SlL和SlSiL复合掺合料随着掺量的提高，长龄期胶砂抗压和抗折强度均略有下降。 Abstract: Five kinds of composite admixtures were composed of fly ash (F), slag powder (Sl), silica fume (Si) and limestone powder (L) in varying proportions. The effects of composition and content of composite admixtures on fluidity, long-term compressive strength and flexural strength of cement mortar were studied. The research results show that the flow properties of FSlL and FL composite admixtures that contain fly ash and limestone powder are superior, and the fluidity ratio is above 110%. The flow properties of FSlSi and SlSiL composite admixtures with silica fume are inferior, and the fluidity is about 80%. The compressive strength and flexural strength of 720 d mortar specimen with five kinds of composite admixtures are 110%~120% of those of pure cement specimen when the dosages of composite admixtures separately are 30%, 40% and 50%. With the increase of the content of FSlSi, FSl or FL, the long-term compressive strength of mortar increases, and the development trend of flexural strength is the same as that of compressive strength. As the increase of the content of SlL and SlSiL, the long-term compressive strength and flexural strength of mortar decrease slightly.

蒋鹤,李树繁,王小明,等.复合掺合料对水泥胶砂流动度和长期强度的影响[J].混凝土与水泥制品,2021(1),1-6. JIANG H,LI S F,WANG X M,et al.Effect of Composite Admixtures on Fluidity and Long-term Strength of Cement Mortar[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(1):1-6.

混凝土塑性损伤模型参数的选取与验证计算

张飞，马建勋，南燕

2021年第1期

摘要

引用本文

摘要：基于塑性损伤的混凝土本构模型，现行规范与ABAQUS软件给出的应力-应变关系表达式有所不同。在对两种表达式进行分析对比的基础上，对ABAQUS软件自带的混凝土塑性损伤模型（CDP模型）参数选取进行了分析，并给出了该模型参数的选取和调整方法。为了验证模型参数选取的合理性和可靠性，采用ABAQUS软件对算例试验构件进行了有限元数值分析，并将数值分析所得的荷载-位移曲线与试验测试曲线进行对比。结果表明：所选的参数能够满足数值分析的精度要求。 Abstract: For the concrete constitutive model based on the plastic damage, the stress-strain relationship expression in the current code is different from the expression given by ABAQUS software. Based on the analysis and comparison of the two expressions, the parameter selection in the CDP model of ABAQUS software was analyzed, and the selection and adjustment methods of the model parameters were given. In order to verify the rationality and reliability of model parameter selection, ABAQUS software was used to carry out a finite element numerical analysis on the example test members, and the load-displacement curve obtained from the numerical analysis was compared with the test curve. The results show that the parameters selection described can meet the accuracy requirements of numerical analysis.

张飞,马建勋,南燕.混凝土塑性损伤模型参数的选取与验证计算[J].混凝土与水泥制品,2021(1),7-11,29. ZHANG F,MA J X,NAN Y.Parameters Selection and Verification Calculation of Concrete Plastic Damage Model[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(1):7-11,29.

纳米SiO2对不同孔隙率下透水混凝土性能的影响

张粉芹，申明昊，杨程鸿，陈越，许浩然

2021年第1期

摘要

引用本文

摘要：采用体积法设计孔隙率分别为15%、20%、25%的透水混凝土，研究了纳米SiO2（NS）对透水混凝土抗压强度、透水系数的影响规律。总结了不同孔隙率下透水混凝土的破坏形式，并分析了破坏机理。结果表明：随着NS掺量的增加，三种孔隙率下透水混凝土的抗压强度均呈先增加后减少的趋势，在NS掺量为1.0%时，抗压强度都达到最大值；NS对透水混凝土7 d抗压强度的提升效果比28 d更显著；随着孔隙率逐渐增大，NS对透水混凝土抗压强度的改善效果逐渐增强，而对透水系数的提升效果逐渐减弱；从透水混凝土的破坏形式上来看，随着孔隙率逐渐增大，掺入适量NS的透水混凝土，其骨料处断裂的现象相较未掺NS时逐渐增多。 Abstract: The pervious concrete with porosity of 15%, 20% and 25% was designed by using the volume method, and the effect of nano-SiO2 (NS) on the compressive strength and hydrological permeability of pervious concrete under three porosities was studied. The failure modes and mechanism of pervious concrete under different porosities were summarized and analyzed. The research results show that with the increase of the NS content, the compressive strength of pervious concrete under the three porosities first increases and then decreases, and the compressive strength reaches the maximum when the NS content is 1.0%. The improvement effect of 7 d compressive strength of pervious concrete is more significant than that of 28 d. As the porosity gradually increases, the improvement effect of NS on compressive strength of pervious concrete gradually increases, but the effect of increasing the hydrological permeability gradually decreases. From the terms of the damage form, as the porosity gradually increases, the fracture phenomenon of the pervious concrete which mixed with an appropriate amount of NS will gradually increase than the case without NS.

张粉芹,申明昊,杨程鸿,等.纳米SiO2对不同孔隙率下透水混凝土性能的影响[J].混凝土与水泥制品,2021(1),12-16. ZHANG F Q,SHEN M H,YANG C H,The Effect of Nano-SiO2 on Propereies of Pervious Concrete Under Different Porosities[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(1):12-16.

定形相变材料的制备及对混凝土耐高温性能的影响

王永伟1，唐百晓2，王伟涛3

2021年第1期

摘要

引用本文

摘要：为了提高混凝土结构的耐高温性能，从混凝土自身的储热性能出发，制备了一种定形相变材料，并研究了该相变材料对混凝土导热性能和高温后力学强度的影响。结果显示：硫酸铝铵掺量越高，相变材料的相变焓越大，当其掺量超过70%时，差示扫描量热法（DSC）特征参数趋于稳定；定形相变材料具有较好的热稳定性，且高温下硫酸铝铵和SiO2并未发生化学反应；相变材料的加入能提高混凝土的储能密度，降低其导热系数，混凝土内部的温度随相变材料掺量的增多而逐渐降低；当相变材料掺量小于6.5%时，相变材料的加入能明显提高混凝土高温后的强度，而当相变材料掺量大于6.5%时，再提高其掺量对混凝土耐高温性能的改善作用有限。 Abstract: In order to improve the high temperature performance of concrete structure, a stationary phase transition material based on the heat storage properties of concrete was prepared, and the influence of phase transition material on thermal properties and mechanical strength after high temperature were studied. The results show that the higher the content of NH4Al(SO4)2·12H2O, the greater the phase transition enthalpy of the phase transition material. When the amount of admixture exceeds 70%, the DSC characteristic parameters tend to be stable. The stationary phase transition material has good thermal stability, and there is no chemical reaction between NH4Al(SO4)2·12H2O and SiO2 at high temperatures. The addition of phase transition materials can increase the energy storage density of concrete, and reduce its thermal conductivity. The temperature inside of the concrete gradually decreases with the increase of the amount of phase transition materials. When the amount of phase change material is less than 6.5%, the addition of phase change material can obviously increase the strength of the concrete after high temperature. When the amount of phase change material is greater than 6.5%, the effect of the amount of phase change material on the high temperature resistance of concrete is limited.

王永伟,唐百晓,王伟涛.定形相变材料的制备及对混凝土耐高温性能的影响[J].混凝土与水泥制品,2021(1),17-20. WANG Y W,TANG B X,WANG W T.The Preparation of Stationary Phase Transition Materials and Its Effect on the High Temperature Resistance of Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(1):17-20.

PMMA聚合物复合混凝土的制备及机理研究

陈宇婷1,2，杨周1，李静1，李耀环1，梁欢2

2021年第1期

摘要

引用本文

摘要：将有机聚合物单体与普通水泥通过常温共聚的方法制备了一种新型复合混凝土，可以有效解决常见聚合物改性混凝土相容性差、过程复杂及成本高等问题。试验结果表明：当水泥改性剂用量2.0 %、甲基丙烯酸甲酯掺量30 %时，混凝土的工作性、强度及抗渗性等综合性能达到最优。另外，通过扫描电镜、表面接触角和红外光谱分析等方法，研究了甲基丙烯酸甲酯与改性胶材互穿网络式共聚机理。 Abstract: A new type of composite concrete was prepared by copolymerization of organic polymer monomer and ordinary cement at room temperature, which could effectively solve the problems of poor compatibility, complex process and high cost of common polymer modified concrete. The results show that when the dosage of cement modifier is 2.0%, the dosage of methyl methacrylate is 30%, and the comprehensive properties such as workability, strength and impermeability of the condensate are optimized. In addition, the IPN copolymerization mechanism of MMA and modified cementitious materials was studied by means of SEM, surface contact angle and infrared spectrum.

陈宇婷,杨周,李静,等.PMMA聚合物复合混凝土的制备及机理研究[J].混凝土与水泥制品,2021(1),21-25. CHEN Y T,YANG Z,LI J,et al. Preparation and Mechanism Research of PMMA Polymer Composite Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(1):21-25.

相变储能砂浆的制备和力学性能试验研究

边亚东1，王盟盟1，吕亚军2，梁振1，王克俭1

2021年第1期

摘要

引用本文

摘要：以石蜡为相变材料，膨胀珍珠岩做支撑基体，制备了膨胀珍珠岩-石蜡复合相变材料，采用苯丙乳液对复合相变材料封装，利用封装后的复合相变材料替代部分细骨料制备了相变储能砂浆，并对其力学性能进行了试验研究。结果表明：苯丙乳液对复合相变材料有很好的封装作用；随着复合相变材料替代率的增大，相变储能砂浆的力学性能下降；当复合相变材料替代率为70%时，相变储能砂浆的抗压强度为12.7 MPa，满足规范中对建筑围护结构砂浆的要求。研究成果可为相变材料在建筑中的应用提供参考。 Abstract： Using paraffin as the phase change material and expanded perlite as the support matrix, the expanded perlite-paraffin composite phase change material was prepared, and the composite phase change material was encapsulated with styrene-acrylic emulsion, and the encapsulated composite phase change material was used to replace part of the fine aggregate to prepare the phase change energy storage mortar, and the mechanical properties of the phase change energy storage mortar were tested. The results show that styrene-acrylic emulsion has a good encapsulation effect on the expanded perlite composite phase change material. As the replacement rate of composite phase change material increases, the mechanical properties of the phase change energy storage mortar decrease. When the replacement rate is 70%, the compressive strength of the phase change energy storage mortar is 12.7 MPa, which meets the requirements of the building envelope mortar in the code. The research results can provide references for the application of phase change materials in construction.

边亚东,王盟盟,吕亚军,等.相变储能砂浆的制备和力学性能试验研究[J].混凝土与水泥制品,2021(1),26-29. BIAN Y D,WANG M M,LYU Y J,et al.Experimental Study on Preparation and Mechanical Properties of Phase Change Energy Storage Mortar[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(1):26-29.

利用碱性电解水激发砂浆中矿粉活性的研究

李长江1，刘桂宾1，于琦1，李秋义2，王亮2

2021年第1期

摘要

引用本文

摘要：利用碱性电解水制备矿粉砂浆，研究了不同取代率矿粉对砂浆工作性和力学性能的影响，结合XRD分析，评价了利用碱性电解水激发矿粉的活性和改善矿粉砂浆性能的可行性。结果表明：碱性电解水矿粉砂浆的工作性和力学性能均优于自来水矿粉砂浆；当矿粉取代率为20%时，碱性电解水矿粉砂浆的28 d抗折强度和抗压强度较自来水矿粉砂浆分别提高了11.9%和23.5%；碱性电解水矿粉砂浆中存在多钙钾石膏和钾长石，且水化硅酸钙和铝酸钙矿物的衍射峰显著强于自来水矿粉砂浆。 Abstract: The alkaline electrolyzed water was used as mixing water to prepare slag powder mortar, and the effect of different replacement ratios of slag powder on the workability and mechanical properties of mortar were studied. Combined with XRD analysis, the feasibility of using alkaline electrolyzed water to stimulate the early activity of slag powder and improve the performance of slag powder mortar was evaluated. The results show that the workability and strengths of alkaline electrolyzed water slag powder mortar are both superior to those of tap water slag powder mortar. When the replacement ratio of slag powder is 20%, the 28 d flexural strength and compressive strength of alkaline electrolyzed water slag powder mortar are 11.9% and 23.5% higher than those of tap water slag powder mortar, respectively. Polycalcium potassium gypsum and potassium feldspar are found in alkaline electrolyzed water slag powder mortar, and the diffraction peaks of calcium silicate and calcium aluminate minerals are significantly stronger than those of tap water slag powder mortar.

李长江,刘桂宾,于琦,等.利用碱性电解水激发砂浆中矿粉活性的研究[J].混凝土与水泥制品,2021(1):30-33,47. LI C J,LIU G B,YU Q, Effect of Alkaline Electrolyzed Water on Activating Activity of Slag in Mortar[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(1):30-33,47.

养护条件对MgO膨胀剂膨胀性能的影响

周龙龙，王舜，苗苗，冯竟竟，李思琪，孙传珍

2021年第1期

摘要

引用本文

摘要：对水养、水养转干养和干湿循环养护条件下不同活性MgO膨胀剂（MEA）膨胀性能及水养条件下不同龄期膨胀净浆微观孔结构进行了研究。结果表明：MEA活性越高，其早期膨胀率增速越大，但后期膨胀率增速越慢；水养转干养条件下，干空膨胀落差与MEA活性成正比；干湿循环养护条件下，高活性MgO的补偿收缩效能高于低活性MgO。掺MEA浆体中大于50 nm孔隙的增加可能是砂浆产生膨胀的原因之一；28~180 d时，MEA主要细化的孔区间为20~200 nm。 Abstract: The expansion properties of different active MgO expansive agent (MEA) under the conditions of water curing, water curing to dry curing and dry and wet cycle curing and micro pore structure of different age expansive paste under water condition were studied. The results show that the higher the activity of MEA, the higher the early expansion rate, but the slower the later expansion rate. Under the condition of water curing to dry curing, dry air expansion drop is directly proportional to MEA activity. Under the condition of dry and wet cycle curing, the compensation contraction efficiency of high active MgO is higher than that of low active MgO. The addition of MEA promotes the increase of pores larger than 50 nm in the paste, which may be one of the reasons for the expansion of the mortar. At the age of 28 to 180 days, the main refining pores of MEA are between 20 nm and 200 nm.

周龙龙,王舜,苗苗,等.养护条件对MgO膨胀剂膨胀性能的影响[J].混凝土与水泥制品,2021(1):34-38 ZHOU L L,WANG S,MIAO M,et al.The Effect of Different Curing Conditions on the Expansive Properties of MgO Expansive Agent[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(1):34-38.

总访问量 468,401 网站统计

官方微信公众号关闭

关于我们 | 联系我们 | 订购杂志 | 回到顶部

苏ICP备10086386号

网站建设：中企动力苏州