Study on Development of Fine Aggregate for Concrete and its Effective Utilization

混凝土用细骨料的研制及其有效利用研究

基本信息

批准号：
14550464
负责人：
INOUE Shoichi
金额：
$ 1.86万
依托单位：
Tottori University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550464/
关键词：
Decomposed granite MSW slag Imported fine aggregate from China Glass cullet Waste plastic Pulverized dry sludge Limestone powder Mix proportion 焼却灰溶解スラグプラスチック生コンスラッジ中国砂フェロニッケルスラグ疲労

项目摘要

In this study, the decomposed granite, Chinese sand, Gasification slag from municipal solid waste, and waste glass cullet as fine aggregate for concrete were dealt with and the properties of fresh and hardened concrete were investigated. Subsequently, mix proportion and manufacture of concrete with water content of 150 kg/m3 and slump of 8 cm using three kinds of decomposed granite including one from three kinds of Togou Dam site origin were conducted. The examined. The problems with this mix design, and the properties of the fresh and hardened concrete with the decomposed granite also were examined and compared with that of ordinary concrete with normal sand. The test results showed that the disadvantage of concrete with the decomposed granite where (1)slump loss with time is larger, (2)bleeding becomes almost equal to zero, and (3)setting time becomes short compared with that of the ordinary concrete, could improve to have almost the same physical properties as that of ordinary concr … More ete with normal sand by using a retarder type of air-entraining high-range water deducing agent.In second study, effective utilization of Chinese sand and fine powders of industrial waste as fine aggregate for concrete was examined. At first, three types of fine aggregate were prepared mixing crushed sand, river sand and two types of Chinese sand and the effect of the type of fine aggregate on the properties of concrete. Secondly, fine particles powder less than 0.15mm were mixed with Chinese sand, because Chinese sand has a little quantity of fine particle under 0.15mm. The selected fine particle powder were crushed stone fine powder, ferro-nickel slag fine powder, glass fine powder, pulverized dry sludge powder and two types of limestone powder. The effects of type of fine particle on the properties of concrete were examined. Test results showed that the concrete with Chinese sands was poor viscosity and much bleeding, and these undesirable properties were improved with the fine particle except for ferro-nickel slag fine powder,Third study examined two kinds of gasification MSW (Melting Slag from Municipal Solid Waste) slag and examined the possibility of its utilization as fine and coarse aggregate for concrete. It is clear that the possibility is high because the selected MSW slag satisfies the quality standard fine aggregate for concrete. The concrete product of 50% slag replacement ratio to fine aggregate and of 80% slag replacement ratio to coarse aggregate had no problem with strength and freeze-1hw resistance. It is, therefore, judged that the product can be put to use. Less

本研究以风化花岗岩、沙子、城市生活垃圾气化渣和废玻璃碎屑作为混凝土细骨料，研究了新拌混凝土和硬化混凝土的性能，并研究了混凝土的配合比和制造。使用三种风化花岗岩（包括 Togou 大坝遗址的三种）的含水量 150 kg/m3 和坍落度 8 cm 进行了检查，并研究了该配合比设计的问题。还对风化花岗岩新拌混凝土和硬化混凝土的性能进行了检测，并与普通砂混凝土的性能进行了比较。试验结果表明，风化花岗岩混凝土的缺点是：（1）随时间的坍落度损失较大。 (2)泌水几乎为零，(3)凝结时间比普通混凝土短，通过使用缓凝剂，可以改善其与普通混凝土几乎相同的物理性能。类型在第二项研究中，对中国砂和工业废料细粉作为混凝土细骨料的有效利用进行了研究。首先，混合碎砂、河砂制备了三种类型的细骨料。以及两种类型的砂子以及细骨料类型对混凝土性能的影响。其次，由于砂子中0.15mm以下的细颗粒数量较少，因此掺入0.15mm以下的细颗粒粉。精选细颗粒粉末分别考察了碎石细粉、镍铁矿渣细粉、玻璃细粉、粉碎干污泥粉和两种类型的石灰石粉，试验结果表明：中国砂的粘度差，泌水多，这些不良性质通过除镍铁渣细粉外的细颗粒得到改善，第三项研究考察了两种气化MSW（熔融城市生活垃圾的矿渣）并考察了其作为混凝土细骨料和粗骨料的可能性，因为所选的城市生活垃圾矿渣满足混凝土细骨料质量标准的50%。矿渣对细骨料的替代率和80%的矿渣对粗骨料的替代率在强度和抗冻性方面没有问题，因此判断该产品可以使用。