Self-compacting mortars with mineral additions: perlite and limestone filler

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2021-01-01 DOI:10.7764/rdlc.20.3.479

Verónica Fernanda Artigas, M. Positieri, Marı´a Virginia Quintana, Ángel Oshiro, Franco Rodrigo Cortez

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引用次数: 3

Abstract

With the increasing infrastructure and the need for eco-sustainable alternatives, the concrete industry has motivated to look for supplementary cementitious materials especially those generated from waste. The advantages of self-compacting concrete (SCC) make it useful in the worldwide; therefore, it is essential to study additions that can be incorporated into it, to improve its properties. Limestone powder (LP) and local waste perlite fines (PF) from Salta (Argentina) are proposed as mineral addition in self-compacting mortars (SCM). PF has a high content of SiO2 and Al2O3 which can contribute to increasing the strength of the concrete due to the pozzolanic reaction. Physicochemical characterization of this waste is studied and the behavior of SCM mixtures with different proportions of LP and PF are also analyzed. Sets of specimens have been performed in order to test their rheological characteristics in the fresh state and their mechanical resistance in the hardened state. The results indicate that the combination of LP and PF has a beneficial influence on the fresh state, granting an adequate fluidity and viscosity of the mixture; on the hardened state, compressive strengths similar to the standard are achieved at 90 days in mortars with up to 20% cement replacement by additions.

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含矿物添加剂的自密实砂浆:珍珠岩和石灰石填料

随着基础设施的增加和对生态可持续替代品的需求，混凝土行业已经开始寻找补充胶凝材料，特别是那些由废物产生的材料。自密实混凝土(SCC)的优点使其在世界范围内得到广泛应用;因此，有必要研究可以加入它的添加剂，以改善其性能。提出了石灰石粉(LP)和当地废珍珠岩粉(PF)作为自密实砂浆(SCM)的矿物添加物。PF具有较高的SiO2和Al2O3含量，由于火山灰反应，有助于提高混凝土的强度。研究了该废弃物的理化性质，并分析了不同比例LP和PF的SCM混合物的性能。为了测试其在新鲜状态下的流变特性和在硬化状态下的机械阻力，已经进行了几组样品的测试。结果表明，LP和PF的组合对新鲜状态有有益的影响，使混合物具有足够的流动性和粘度;在硬化状态下，砂浆在90天内达到与标准相似的抗压强度，并且添加了高达20%的水泥替代品。

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来源期刊

Revista de la Construccion 工程技术-工程：土木

CiteScore

2.30

自引率

21.40%

发文量

期刊介绍： The Journal of Construction is aimed at professionals, constructors, academics, researchers, companies, architects, engineers, and anyone who wishes to expand and update their knowledge about construction. We therefore invite all researchers, academics, and professionals to send their contributions for assessment and possible publication in this journal. The publications are free of publication charges. OBJECTIVES The objectives of the Journal of Construction are: 1. To disseminate new knowledge in all areas related to construction (Building, Civil Works, Materials, Business, Education, etc.). 2. To provide professionals in the area with material for discussion to refresh and update their knowledge. 3. To disseminate new applied technologies in construction nationally and internationally. 4. To provide national and foreign academics with an internationally endorsed medium in which to share their knowledge and debate the topics raised.