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

BIM技术在装配整体式结构正向设计中的应用研究

刘爽1，龚鑘1，2,周理1.2

2022年第8期

摘要

引用本文

摘要：以某大学装配式框架结构宿舍项目为例，分析了BIM技术应用于装配式建筑正向设计的流程，研究了预制构件拆分、构件节点钢筋碰撞避让等问题，可为装配整体式结构的设计、生产及施工提供参考。 Abstract：Taking the prefabricated frame structure dormitory project of a university as an example, the process of applying BIM technology to the forward design of prefabricated buildings is analyzed, and the problems such as the separation of prefabricated components and collision avoidance of reinforcement at component nodes were studied, which can provide a reference for the design, production and construction of assembled integral structures.

刘爽,龚鑘,周理.BIM技术在装配整体式结构正向设计中的应用研究[J].混凝土与水泥制品,2022(8):64-69. LIU S,GONG L,ZHOU L.Study on the Application of BIM Technology in Forward Design of Assembled Integral Structure[J].China Concrete and Cement Products,2022(8):64-69.

泡沫混凝土复合保温墙板研究

项泽强1，李晓宁1，赵敦1，颜小波1，梁泽锋2，孟志武1

2022年第8期

摘要

引用本文

摘要：以普通硅酸盐水泥、粉煤灰、硫铝酸盐水泥、石膏为胶凝材料，掺入减水剂、保水剂、纤维、发泡剂等制备了泡沫混凝土，通过分析发泡剂稳泡时间、泡沫混凝土的凝结时间、抗压强度和膨胀率确定了最优配合比，并对最优配合比下的墙板进行了中试试验。结果表明：发泡剂的最佳稳泡时间为1 h以内；当m普通硅酸盐水泥∶m粉煤灰∶m硫铝酸盐水泥∶m石膏=5.0∶4.0∶0.4∶0.6时，泡沫混凝土的初凝时间小于60 min，抗压强度＞3.5 MPa，膨胀率达到镁基水泥水平，抗开裂性能良好，且此配合比下的墙板各项性能指标良好。 Abstract: Foamed concrete was prepared by using ordinary portland cement, fly ash, sulfoaluminate cement and gypsum as cementing materials, adding water reducing agent, water retaining agent, fiber and foaming agent. The optimal mix proportion was determined by analyzing the foam stabilization time of the foaming agent and the setting time, the compressive strength and the expansion rate of foamed concrete, and the pilot test was carried out for the wallboard under the optimal mix proportion. The results show that the optimum foam stabilization time of the foaming agent is within 1 h. When mordinary portland cement ∶ mfly ash ∶ msulphoaluminate cement ∶ mgypsum is 5.0∶4.0∶0.4∶0.6, the initial setting time of foamed concrete is less than 60 min, the compressive strength is more than 3.5 MPa, the expansion rate reaches the level of magnesium based cement, the cracking resistance is good, and all performance indexes of wallboard under this mix proportion are good.

项泽强,李晓宁,赵敦,等.泡沫混凝土复合保温墙板研究[J].混凝土与水泥制品,2022(8):70-73,82. XIANG Z Q,LI X N,ZHAO D,et al.Study on Foamed Concrete Composite Insulation Wallboards[J].China Concrete and Cement Products,2022(8):70-73,82.

后浇自密实混凝土拼接叠合梁抗弯性能试验研究

薛建英，曹小飞

2022年第8期

摘要

引用本文

摘要：设计制作了5根后浇自密实混凝土拼接叠合梁，预制部分用C30普通混凝土，后浇部分用C30自密实混凝土；同时设计了1根用C30普通混凝土浇筑的整浇梁作为对照梁。通过抗弯性能试验，得到了试验梁的跨中挠度、裂缝发展规律和破坏特征。结果表明：拼接叠合梁的受弯破坏形态与对照梁类似，均为适筋破坏；增大拼接叠合面的粗糙度可以提高拼接叠合梁的抗弯承载力，但抗弯承载力与粗糙度不成正相关关系，这与预制部分混凝土中的粗骨料粒径和级配有关；采用箍筋加密和拼接叠合面插筋的方式均可以保证拼接叠合梁的抗弯承载力。 Abstract: Five post-cast self-compacting concrete spliced composite beams were designed, the precast part was poured with C30 ordinary concrete, and the post-cast part was poured with C30 self-compacting concrete. In addition, one cast-in-place beam poured with C30 ordinary concrete was designed as the control beam. Through the flexural performance test, the mid-span deflection, crack development law and failure characteristics of test beams were obtained. The results show that the flexural failure form of the spliced composite beam is similar to that of the control beam, both of which are the appropriate reinforcement failure. Increasing the roughness of the spliced composite surface can improve the flexural capacity of the spliced composite beam, but the flexural capacity is not positively related to the roughness, which is related to the particle size and gradation of coarse aggregate in the precast concrete. Both stirrup encryption and spliced reinforcement can improve the flexural capacity of the spliced composite beam.

薛建英,曹小飞.后浇自密实混凝土拼接叠合梁抗弯性能试验研究[J].混凝土与水泥制品,2022(8):74-77,86. XUE J Y,CAO X F.Experimental Study on Flexural Performance of Post-cast Self-compacting Concrete Spliced Composite Beams[J].China Concrete and Cement Products,2022(8):74-77,86.

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