房建材料及制品_2022_《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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房建材料及制品

高强硅酸盐陶粒混凝土的制备及性能研究

朱然1,2，王圣怡1,2，占羿箭1,2

2022年第5期

摘要

引用本文

摘要：对陶粒、陶砂进行预湿处理，并将其用于配制高强硅酸盐陶粒混凝土，研究了水胶比、漂珠掺量、陶砂取代率对高强硅酸盐陶粒混凝土性能的影响。结果表明：预吸水陶粒、陶砂具备改善界面性能、内养护等多重作用，可有效提高轻骨料混凝土的强度；水胶比是决定轻骨料混凝土强度的关键因素，随着水胶比的降低，轻骨料混凝土的强度增长明显；减重材料如漂珠应谨慎使用，使用时应设置合理的应用区间，避免轻骨料混凝土中的水分含量出现较大波动。 Abstract: The ceramsite and ceramic sand were pre-wetted and used to prepare high-strength silicate ceramsite concrete. The effects of water-binder ratio, fly ash cenosphere content and ceramic sand replacement rate on the properties of high-strength silicate ceramsite concrete were studied. The results show that pre-absorbent ceramsite and ceramic sand have multiple functions such as improving the interface performance and internal curing, which can effectively increase the strength of lightweight aggregate concrete. The water-binder ratio is the key factor in determining the strength of lightweight aggregate concrete. As the water-binder ratio decreases, the strength of lightweight aggregate concrete increases significantly. Weight-reducing materials such as fly ash cenosphere should be used with caution, and a reasonable application interval should be set to avoid large fluctuations in the moisture content of lightweight aggregate concrete.

朱然,王圣怡,占羿箭.高强硅酸盐陶粒混凝土的制备及性能研究[J].混凝土与水泥制品,2022(5):67-71. ZHU R,WANG S Y,ZHAN Y J.Study on Preparation and Properties of High-strength Silicate Ceramsite Concrete[J].China Concrete and Cement Products,2022(5):67-71.

纳米C-S-H对固硫灰蒸压加气混凝土水化产物形成的影响

柏秀奎1，林俊豪2，曹德光1，韦炫辰1，欧天安2，潘荣伟2，李乘光3

2022年第5期

摘要

引用本文

摘要：通过强度、干密度测试以及XRD、FTIR、SEM分析，研究了纳米C-S-H对固硫灰蒸压加气混凝土性能及水化产物的影响。结果表明：随着纳米C-S-H掺量的增加，蒸压加气混凝土的干密度和抗压强度均呈先增后降的趋势，且当纳米C-S-H掺量为3%时，蒸压加气混凝土的抗压强度最大，较空白组提高了13.2%；在蒸压养护条件下，纳米C-S-H的掺入一方面促进了体系中的Ca(OH)2与固硫灰中的活性SiO2和Al2O3反应，形成了更多的托贝莫来石和C-S-H凝胶，另一方面加速了托贝莫来石和C-S-H凝胶的生长速度，形成了尺寸更大的反应产物；纳米C-S-H的掺入降低了蒸压加气混凝土中的孔洞率，提高了蒸压加气混凝土的密实度和强度；固硫灰中的三种主要物相与Ca(OH)2的蒸压反应活性大小为薄片叠层状的黏土矿物热分解产物最高，带棱角粒状的石英颗粒次之，球状的铝硅酸钙物相最低。 Abstract: The effects of nano-C-S-H on properties and hydration products of autoclaved aerated concrete with circulating fluidized bed fly ash were studied by strength, dry density tests and XRD, FTIR and SEM analysis. The results show that the dry density and compressive strength of autoclaved aerated concrete increase first and then decrease with the increase of nano-C-S-H content, and the compressive strength of autoclaved aerated concrete reaches the maximum when the nano-C-S-H content is 3%, which is 13.2% higher than that of blank group. Under the autoclastic curing condition, the addition of nano-C-S-H promotes the reaction of Ca(OH)2 in the system with active SiO2 and Al2O3 in the circulating fluidized bed fly ash, forming more tobermorite and C-S-H gel, and accelerates the growth rate of tobermorite and C-S-H gel, forming reaction products with larger size. The addition of nano-C-S-H reduces the porosity of autoclaved aerated concrete, and improves the density and compressive strength of autoclaved aerated concrete. The autoclaved reaction activity of the three main phases in the circulating fluidized bed fly ash with Ca(OH)2 is that the laminated products of clay are the highest, followed by the angular granular quartz particles, and the spherical phase of calcium aluminosilicate is the lowest.

柏秀奎,林俊豪,曹德光,等.纳米C-S-H对固硫灰蒸压加气混凝土水化产物形成的影响[J].混凝土与水泥制品,2022(5):72-76. BAI X K,LIN J H,CAO D G,et al.Effect of Nano-C-S-H on the Formation of Hydration Products of Autoclaved Aerated Concrete with Circulating Fluidized Bed Fly Ash[J].China Concrete and Cement Products,2022(5):72-76.

带高位转换层高层建筑结构转换梁的受力分析

王再举，张娅

2022年第5期

摘要

引用本文

摘要：利用PKPM软件中的SATWE模块和ANSYS软件对驻马店市驿城区某住宅小区4#楼B座高位转换结构中两根具有代表性的转换梁进行了受力计算，获得了高位转换结构中转换梁的弯矩值、剪力值、轴力值、挠度值大小及其变化规律，并利用两种软件计算出了结构周期。结果表明：利用ANSYS软件计算得到的框支梁弯矩值、剪力值、轴力值均小于利用SATWE模块计算得到的结果，且二者的变化规律相同，部分SATWE计算结果比ANSYS计算结果大近3倍，证明了SATWE计算结果的安全性；而利用SATWE模块计算得到的框支梁挠度值小于利用ANSYS软件计算得到的结果，部分ANSYS计算结果比SATWE计算结果大近2.5倍；两种软件计算出的结构周期变化规律基本吻合；研究结果对相关结构设计具有指导意义，可为实际工程提供参考。 Abstract: The SATWE module in PKPM software and ANSYS software were used to calculate the force of two representative transfer beams in the high-level transfer structure of Block B of Building 4# in Yicheng District of Zhumadian City, and the bending moment value, shear force value, axial force value and deflection value of transfer beams in high-level transfer structure and their changing rules were obtained. The structural cycles were calculated by the two softwares. The results show that the bending moment value, shear force value and axial force value of the frame-supported beam calculated by ANSYS software are less than those calculated by SATWE module, and the changing rules of the two are the same, and some SATWE calculation results are nearly 3 times larger than ANSYS calculation results, which proves the safety of SATWE calculation results. The deflection value of the frame-supported beam calculated by SATWE module is less than that calculated by ANSYS software, and some ANSYS calculation results are nearly 2.5 times larger than SATWE calculation results. The structural cycle variation laws calculated by the two softwares are basically consistent. The research results have guiding significance for related structural design and can provide reference for practical engineering.

王再举,张娅.带高位转换层高层建筑结构转换梁的受力分析[J].混凝土与水泥制品,2022(5):77-80. WANG Z J,ZHANG Y.Stress Analysis of Transfer Beam of High-rise Building Structure with High Transfer Floors[J].China Concrete and Cement Products,2022(5):77-80.

碱激发再生黏土砖粉泡沫混凝土性能研究

余昭阳1，刘润清1，葛星2，崔云鹏1

2022年第5期

摘要

引用本文

摘要：研究了在碱激发方式下再生黏土砖粉的活性激发效果和机理，探究了活性激发后的再生黏土砖粉用于制备泡沫混凝土的可行性。结果表明：复合碱激发剂可以提高再生黏土砖粉-水泥胶凝材料的28 d抗压强度和活性指数，当复合碱激发剂掺量为3%时，试件的28 d抗压强度和活性指数分别为22.42 MPa和73.3%，激发效果最好；当采用复合碱激发剂时，胶凝材料体系的水化放热速率和水化放热总量低，水化反应时间长，试件的后期强度高；当复合碱激发剂掺量为3%、再生黏土砖粉掺量为40%、水胶比为0.50时，再生黏土砖粉泡沫混凝土的性能满足JG/T 266—2011《泡沫混凝土》的要求。 Abstract: The activation effect and mechanism of recycled clay brick powder under alkali excitation were studied, and the feasibility of using recycled clay brick powder to prepare foamed concrete was explored. The results show that the composite alkali activator can improve the 28 d compressive strength and activity coefficient of recycled clay brick powder- cement cementitious material, and when the content of composite alkali activator is 3%, the 28 d compressive strength and activity coefficient of the specimen are 22.42 MPa and 73.3% respectively, the excitation effect is the best. When the composite alkali activator is used, the hydration heat release rate and total hydration heat release of the cementitious material system are low, the hydration reaction time is long, and the later strength of the specimen is high. When the content of composite alkali activator is 3%, the amount of recycled clay brick powder is 40% and the water-binder ratio is 0.50, the performance of recycled clay brick powder foamed concrete meets the requirements of JG/T 266—2011 Foamed Concrete.

余昭阳,刘润清,葛星,等.碱激发再生黏土砖粉泡沫混凝土性能研究[J].混凝土与水泥制品,2022(5):81-85,89. YU Z Y,LIU R Q,GE X,et al.Study on Properties of Alkali Activated Recycled Clay Brick Powder Foamed Concrete[J].China Concrete and Cement Products,2022(5):81-85,89.

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