摘 要：按普通混凝土配合比设计的方法配制强度等级为C30、C40、C50的混凝土，通过对天然细砂、人工粗砂、铁尾矿砂进行级配优化后，研究了不同掺量的铁尾矿砂对不同强度等级混凝土基本性质的影响。结果表明，掺入铁尾矿砂后混凝土拌合物的和易性下降，且掺量越大，混凝土坍落度及扩展度越小；用铁尾矿砂配制的C30、C40混凝土，其强度略高于普通混凝土，且随铁尾矿砂掺量增加而略有增加，但用铁尾矿砂配制的C50混凝土，其强度略低于普通混凝土。 Abstract: C30, C40 and C50 concrete were prepared by the method of proportion design of ordinary concrete. After the gradation optimization of natural fine sand, artificial coarse sand and iron tailings, the influence of iron tailings additive amount on the basic properties of various strength grade concrete was studied. The results show that the workability of mixing concrete with iron tailing sand decreases. The greater the amount of iron tailing sand in the concrete mix, the lower the measured values of slump and expansion. The strength of C30 and C40 concrete prepared with iron tailing sand are slightly higher than that of ordinary concrete respectively, and slightly increases with the increase of iron tailing sand content. But the strength of C50 concrete prepared with iron tailing is slightly lower than that of C50 ordinary concrete.

姚雷,李晓芝,鲁明星.铁尾矿砂掺量对混凝土性能的影响[J].混凝土与水泥制品,2019(10):97-100. YAO L,LI X Z,LU M X.Effect of Iron Tailings Content on Performance of Concrete[J].China Concrete and Cement Products,2019(10):97-100.

摘 要：针对当前原状稻壳灰储量大，难以资源化利用的困境，研究了原状稻壳灰及其粉磨对水泥胶砂强度的影响，结合扫描电镜和氮吸附法分析其影响机理，同时比较其与粉煤灰对胶砂性能的影响。结果表明，原状稻壳灰显著降低了水泥胶砂强度，且随着其掺量的增加，其降低幅度越来越大；原状稻壳灰粉磨极大地增加了胶砂强度，与基准胶砂强度相近，大于粉煤灰胶砂；原状稻壳灰劣化了胶砂内部结构，且随着其掺量地增加，其内部结构越来越疏松多孔；原状稻壳灰粉磨有利于改善细化其内部孔结构。 Abstract: At present, there are large reserves of rice husk ash without processing which is difficult to be utilized as resource, so the effect of rice husk ash without processing and its grind product on the strength of cement mortar was studied, and the mechanism was analyzed and revealed by the scanning electron microscopy and nitrogen adsorption method, which was also compared with the effect of fly ash. The results indicate that rice husk ash without processing obviously reduces the strengths of cement mortar, and with the increase of its content, the reduction is larger and larger. However, the grind product of rice husk ash without processing greatly increases the strengths of cement mortar, close to those of the control mortar and more than those of cement mortar containing fly ash. Rice husk ash without processing degrades the internal structure of cement mortar, which is looser and looser with the increase of its content. The grind product of rice husk ash without processing is beneficial to refining and improving the internal pore structure.

杨一凡,何智海.原状稻壳灰及磨细灰对水泥胶砂强度和微观结构的影响[J].混凝土与水泥制品,2019(10):92-96. YANG Y F,HE Z H.Effect of undisturbed rice husk ash and ground ash on strength and microstructure of cement mortar[J].China Concrete and Cement Products,2019(10):92-96.

摘 要：为提高城市生活垃圾焚烧底渣的再生利用价值，以0.18 mm通过率和比表面积作为控制指标进行了不同转速、球磨时间的垃圾焚烧底渣球磨对比试验，并采用不同比表面积的底渣再生微粉内掺替代水泥进行胶砂强度试验。结果表明，垃圾焚烧底渣材质较轻且易于研磨，再生微粉的细度容易达到并远大于水泥的细度；在一定范围内提高转速，可提高再生微粉0.18 mm通过率和比表面积，有效缩短研磨时间；垃圾焚烧底渣再生微粉具有与水泥类似的化学成分及凝胶活性，最大强度活性指数约为57%；细度对再生微粉的胶砂强度影响较为显著，随微粉细度增加，再生微粉胶砂强度总体上呈现先增加后减小的变化趋势；再生微粉对胶砂早期强度影响较小，但会导致胶砂强度增长速度明显变缓。 Abstract: In order to improve the recycling value of waste incinerator residues, the comparison test of waste incineration bottom slag ball mill with different rotational speed and ball milling time was carried out by using the control index of 0.18 mm passing rate and specific surface area, and the cement strength test was carried out with different specific surface area of regenerated powder of bottom slag instead of cement. The results show that the waste incinerator residue is lighter and easier to grind, the fineness of regenerated powder is easy to reach and much larger than that of cement. Increasing the grinding speed in a certain range can improve the 0.18 mm passing rate and specific surface area of the regenerated powder, and effectively shorten the grinding time. The regenerated powder of waste incinerator residues has similar chemical composition and gel activity to cement, and the maximum strength activity index is about 57%. The fineness has a significant effect on the mortar strength of regenerated powder which generally shows a trend of first increasing and then decreasing with the increase of fineness. The regenerated powder has little effect on the early mortar strength, but will slow down the growth rate of mortar strength obviously.

董云,刘畅,张国瀛,等.垃圾焚烧底渣粉磨工艺及再生微粉强度特征[J].混凝土与水泥制品,2019(10):87-91. DONG Y,LIU C,ZHANG G Y,et al.Grinding Technology of the Waste Incineration Residue and Strength Characteristics of Regenerated Power[J].China Concrete and Cement Products,2019(10):87-91.

摘 要：根据混凝土搅拌站绿色设计的要求，分析了混凝土搅拌站绿色环保化进程中的设计理念和实现途径，阐述了混凝土生产过程中废水的回收、利用方式，固体废弃物的处理与应用途径，抑尘和降噪的措施，为混凝土搅拌站的绿色环保设计和生产提供参考。 Abstract: According to the requirement of environment-friendly design of concrete mixing station, the design concept and implement way for the process of concrete batching plant are introduced, and the treatment and reuse of the waste water and solid waste and the way to limit dust and nose produced during production of concrete are disscued, which can provide references for the environment-friendly design and production of the concrete batching plant.

满丽莹,王裕银,李酉成,等.绿色环保混凝土搅拌站的四废处理[J].混凝土与水泥制品,2019(10):84-86. MAN L Y,WANG Y Y,LI Y C,et al.Treatment of Four Kinds of Wastes from Green Concrete Batching Plant[J].China Concrete and Cement Products,2019(10):84-86.

摘 要：以北京市某安置房项目为例，分析了装配式住宅工程产业化施工原理、准备事项，介绍了其施工中的关键技术，例如模架支设、预制板的安装、叠合板夹缝处理、钢筋绑扎、机电管线埋设及混凝土的浇筑、预制楼梯安装。可为类似住宅工程产业化施工提供经验和参考。 Abstract: A resettlement house project in Beijing was used as an example, and the industrialization construction principles and preparations of the prefabricated residential engineering were analyzed, and the key technologies in the construction such as mold frame support, prefabricated plate installation, laminated plate quilting treatment, steel bar lashing, electromechanical pipeline burying and concrete pouring, and prefabricated stair installationare were introduced, which can provide experience and reference for similar residential engineering industrialization construction.

苏永波,王肖方,单贺明.装配式住宅工程产业化施工措施分析[J].混凝土与水泥制品,2019(10):80-83. SU Y B,WANG X F,SHAN H M.Analysis of Construction Measures for Industrialization of Assembled Residential Engineering[J].China Concrete and Cement Products,2019(10):80-83.

为提高混凝土管片模具精度和产品生产效果，针对混凝土管片模具的侧模开合方式、封闭结构、预埋件固定方式进行了研究，并设计了优化方案，供装备企业参考借鉴。 Abstract： In order to improve the precision of the concrete segment mould and the production effect of the product, the side die opening and closing mode, closed structure and embedded parts fixing mode of the concrete segment die were studied, and the optimization scheme was designed for the reference of equipment enterprises.

刘锦涛.预制混凝土衬砌管片模具的研究与改进[J].混凝土与水泥制品,2019(10):77-79. LIU J T.Research and Improvement of Precast Concrete Lining Segment Mould[J].China Concrete and Cement Products,2019(10):77-79.