The effect of local pozzolans and lime additions on the mineralogical, physical and mechanical properties of compressed earth blocks in Argentina

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2022-01-01 DOI:10.7764/rdlc.21.2.248

Santiago Cabrera, K. Elert, Anabela G. Guilarducci, Andrea Margasin

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Abstract

The purpose of this research is to evaluate the mineralogical, physical, and mechanical properties of compressed earth blocks (CEB) stabilized with lime and mineral admixtures easily obtained in Argentina: natural pozzolans and brick powder. the admixture mineralogical composition and their pozzolanic potential as well as the development of hydraulic phases upon reaction with calcium hydroxide (lime) were determined, emphasizing the formation of hydrated cementing compounds. Samples with different percentages of lime and mineral additions were prepared in order to test their compressive strength, wet erosion resistance, and water absorption, and contrasting the results with those of their counterparts stabilized exclusively with lime or cement. The results obtained allow us to affirm that both the brick powder and the pozzolan used have pozzolanic properties and, in combination with calcium hydroxide, form amorphous phases of C-(A)-S-H. However, the use of small amounts of both additions in combination with hydrated air lime in the manufacture of CEB, compared to CEB samples stabilized only with hydrated air lime, adversely affected their physical and mechanical properties.

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阿根廷当地火山灰和石灰添加量对压缩土块矿物学、物理和力学性质的影响

本研究的目的是评估压缩土块(CEB)的矿物学、物理和机械性能，这些压缩土块是用石灰和在阿根廷容易获得的矿物外加剂(天然火山灰和砖粉)稳定的。测定了外加剂的矿物学组成及其与氢氧化钙(石灰)反应时的火山灰势和水力相的发展，强调水合胶结物的形成。为了测试其抗压强度、抗湿侵蚀性和吸水率，制备了不同比例的石灰和矿物添加物的样品，并将结果与仅用石灰或水泥稳定的样品进行了对比。得到的结果使我们确信砖粉和所用的火山灰都具有火山灰性质，并且与氢氧化钙结合形成C-(A)- s - h的无定形相。然而，与仅使用水合空气石灰稳定的CEB样品相比，在制造CEB时使用少量这两种添加剂和水合空气石灰会对其物理和机械性能产生不利影响。

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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.