Investigating the Physical Characteristics of Non-Structural Lightweight Aggregate Blocks of Built with Region Materials

Abstract

Given the importance of light construction in terms of better performance of structure, in case of earthquake, reduction of life and financial casualties, as well as shortage of studies in this field, the present research studied building non-structural lightweight blocks using lightweight aggregates of Scoria, Pumice and Leca. On the other hand, density, compressive strength, and water absorption volume of these blocks have been investigated in this research in order to replace traditional materials with them. The experiments' results show that, due to hardness and strong texture, high mechanical resistance of their lightweight aggregate Scoria blocks have higher compressive strength and density but lower water absorption volume compared to Pumice and Leca lightweight aggregate blocks. Despite desirable compressive strength and lower density compared to the other two blocks, pumice blocks have higher water absorption volume, and they do not meet standards. This makes them less interesting. Among these Leca blocks with density of 1151.94 (kg/m 3 ) below 2000 kg/m 3 of Iran density standard of 7782 (28-day compressive strength of 2.57 MPa), higher than 2.5 MPa of Iran compressive strength standard of 7782 (and water absorption volume of 282.92 kg/m 3 ) and below 288 kg/m 3 of Iran water absorption volume standard of 7782 (as a non-load-bearing lightweight block), has been recognized desirable.

Experimental and Numerical Investigation of Mechanical Properties of Lightweight Concretes (LWCs) with Various Aggregates

“…The research program included the design and testing of 15 LWC mixtures (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15). The purpose of the laboratory tests was to determine the influence of grain strength and porosity, as well as the percentage of the LWA content on the properties of the LWCs.…”

“…A lightweight concrete made from expanded glass granules allows for both casting types, and it could be used as both pre-cast concrete for the production of blocks and as cast-in-place lightweight concrete. Cast-in-place concrete provides a much wider range of concrete applications, e.g., wall structures, floor and road thermal insulation, and floor and roof screeds [13][14][15]. Light composites with foamed aggregates have extremely good thermal and acoustic insulation, fire resistance, and resistance to earthquakes compared to traditional concrete [16][17][18][19][20][21][22][23].…”

Measurements of Thermal Conductivity of LWC Cement Composites Using Simplified Laboratory Scale Method

“…The accuracy of measurement in the use of different techniques for evaluating the thermal conductivity of cement compo-sites is being discussed by scientists. [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. It should be noted that several factors affect the thermal conductivity of concrete: the moisture content, temperature, density, porosity and adsorptivity of aggregate, and the properties of cementitious material are influential factors on the thermal conductivity of concrete [ 29 , 30 , 31 , 32 , 33 ].…”

Use of ecological lightweight aggregates in reinforced concrete structures

“…For several years, scientists have been researching new types of lightweight aggregates. One of the ideas is to combine two types of waste materials of expanded polystyrene (EPS) and unprocessed fly ash (FA) on different properties of concrete (Moayyeri et al, 2016;Bengin, 2017;Ganesh Babu et al, 2005;Petrella et al, 2020). Most research on concrete containing unmodified expanded polystyrene (EPS) has revealed a decrease in concrete's durability and mechanical properties, increasing the amount of EPS particles in concrete.…”