scholarly journals Green and Durable Lightweight Aggregate Concrete: The Role of Waste and Recycled Materials

Materials ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3041 ◽  
Author(s):  
Jiyu Wang ◽  
Kai Zheng ◽  
Na Cui ◽  
Xin Cheng ◽  
Kai Ren ◽  
...  
Keyword(s):  
Solid Waste ◽  
Negative Impact ◽  
Lightweight Aggregate ◽  
Cementitious Materials ◽  
Environmental Benefits ◽  
Industrial Wastes ◽  
Lightweight Aggregate Concrete ◽  
Future Research ◽  
Aggregate Concrete ◽  
By Products

Lightweight aggregate concrete manufactured by solid waste or recycled by-products is a burgeoning topic in construction and building materials. It has significant merits in mitigating the negative impact on the environment during the manufacturing of Portland cement and reduces the consumption of natural resources. In this review article, the agricultural and industrial wastes and by-products, which were used as cementitious materials and artificial lightweight aggregate concrete, are summarized. Besides, the mechanical properties, durability, and a few advanced microstructure characterization methods were reviewed as well. This review also provides a look to the future research trends that may help address the challenges or further enhance the environmental benefits of lightweight aggregate concrete manufactured with solid waste and recycled by-products.

scholarly journals Industrial Wastes-Cum-Strength Enhancing Additives Incorporated Lightweight Aggregate Concrete (LWAC) for Energy Efficient Building: A Comprehensive Review

2021 ◽  
Vol 14 (1) ◽  
pp. 331
Author(s):  
Rajesh Kumar ◽  
Abhishek Srivastava ◽  
Rajni Lakhani
Keyword(s):  
Fly Ash ◽  
Industrial Waste ◽  
Building Materials ◽  
Lightweight Aggregate ◽  
Industrial Wastes ◽  
Lightweight Aggregate Concrete ◽  
Future Research ◽  
Construction Sector ◽  
Mineralogical Characterization ◽  
Aggregate Concrete

Lightweight aggregate concrete (LWAC) exhibits the advantages of thermal insulation, reduces energy consumption building costs, improves building efficiency and easy construction. Furthermore, the utilization of industrial wastes in concrete is advantageous in terms of environmental sustainability. In order to explore this, several researchers investigated the idea of integrating industrial wastes in LWAC. However, the lack of knowledge regarding the performance of industrial waste-based lightweight aggregate concrete hinders the adaptation of this concept and application of LWAC in the construction sector. Therefore, this paper summarizes the research in relation to the sustainable LWACs containing oil palm shell (OPS), lightweight expanded clay aggregate (LECA), vermiculite, perlite, pumice and sintered fly ash as lightweight aggregate, along with industrial wastes and strength-enhancing additives (viz. fibers, polymers, etc.). Firstly, desirable physical, chemical, morphological and mineralogical characterization of different lightweight aggregates are presented, and then a comprehensive overview on fresh, hardened, durability and thermal properties of LWAC incorporating industrial wastes are discussed in comparison with normal weight concrete. The review also highlights the current challenges and suggests the research gaps for further development of eco-friendly LWAC. It is concluded that vermiculite, perlite, pumice, OPS, sintered fly ash and LECA with some suitable industrial waste materials have the potential to be used in the construction sector. Moreover, LWAC with industrial waste has 50–65% lower carbon emission (kg CO2 eq/m3) in the environment. The scientific contribution of this paper provides insights into different LWACs and the knowledge base for future research and paradigm shift of using LWACs as more common alternative building materials.

scholarly journals Utilization of Cementitious Materials with Cold-bonded Artificial Aggregate in Concrete

2019 ◽  
Vol 9 (1) ◽  
pp. 385-388
Keyword(s):  
Compressive Strength ◽  
Silica Fume ◽  
Lightweight Concrete ◽  
Lightweight Aggregate ◽  
Cementitious Materials ◽  
Lightweight Aggregate Concrete ◽  
Optimum Level ◽  
Aggregate Concrete ◽  
Glass Fibres ◽  
Granulated Blast Furnace Slag

This article investigates the slump and compressive strength of artificial lightweight aggregate concrete with Ground Granulated Blast Furnace Slag (GGBFS) and Silica Fume with glass fibres. The increase in usage of cement in the construction industry is a concern for ecological deterioration, in this view; artificial aggregates was manufactured with major amount of fly ash and replacement of cement with various industrial by-products in concrete. An optimum level of GGBFS from 10 to 50% and Silica Fume from 2 to 6% with addition of glass fibres was assessed based on compressive strength values. The compressive strength was conducted for 7 and 28Days of water curing on M30 grade lightweight concrete with constant water to cement ratio as 0.45 and 0.2% of Master Gelenium super plasticizer. The conclusions achieved from the compressive strength of concrete containing GGBFS and Silica Fume was increased as the curing time increases. As a result lightweight aggregate concrete with a cement content of 226 kg/m3 develops 37.3 N/mm2 compressive strength.

Structural Lightweight Aggregate Concrete by Incorporating Solid Wastes as Coarse Lightweight Aggregate

2015 ◽  
Vol 749 ◽  
pp. 337-342 ◽  
Author(s):  
Muhammad Aslam ◽  
Payam Shafigh ◽  
Mohd Zamin Jumaat
Keyword(s):  
Oil Palm ◽  
Lightweight Concrete ◽  
Negative Impact ◽  
Raw Materials ◽  
Lightweight Aggregate ◽  
Normal Weight ◽  
Lightweight Aggregate Concrete ◽  
Lightweight Aggregates ◽  
Aggregate Concrete ◽  
Structural Lightweight Aggregate Concrete

Structural lightweight aggregate concrete offers several benefits as compared to the normal weight concrete. Most common methods of producing structural lightweight concrete is by using artificial lightweight aggregates. However, the cost of the production of artificial lightweight aggregates is high due to energy and raw materials consumption. The use of waste and by-product materials as lightweight aggregate in concrete can provide a better solution to reducing the negative impact of the concrete industry. This paper reports an investigation to produce structural lightweight aggregate concrete by utilizing the locally available solid waste materials, namely oil palm shell (OPS) and oil-palm-boiler clinkers (OPBC) as coarse lightweight aggregates. Two different mix proportions were studied. In the first concrete mix, just OPS was used as coarse aggregate. However, 40% of OPS (by volume) of the first mix was replaced with OPBC in the second mix. The test results showed that by replacing OPS with OPBC, it directly affects the characteristics of the lightweight concrete. The 28-days compressive strength of the blended coarse lightweight aggregate concrete was significantly increased compared to OPS concrete.

scholarly journals Effects of Multiple Supplementary Cementitious Materials on Workability and Segregation Resistance of Lightweight Aggregate Concrete

2018 ◽  
Vol 10 (11) ◽  
pp. 4304 ◽  
Author(s):  
Afonso Solak ◽  
Antonio Tenza-Abril ◽  
José Saval ◽  
Victoria García-Vera
Keyword(s):  
Lightweight Aggregate ◽  
Posidonia Oceanica ◽  
Cementitious Materials ◽  
Supplementary Cementitious Materials ◽  
Mineral Admixtures ◽  
Lightweight Aggregate Concrete ◽  
Aggregate Concrete ◽  
Beneficial Effects ◽  
Binder Ratio ◽  
Different Grain Size

In view of the global sustainable development, it is imperative that supplementary cementing materials (SCM) be used for replacing cement in the concrete industry and several researchers have shown that mineral admixtures can enhance the workability of lightweight aggregate concrete (LWAC) mixture and its strength. In view of the beneficial effects of using SCM in LWAC, this article aims to verify the possible influence of the use of different types of SCM in the segregation phenomenon of LWAC. Three different SCM were studied: Silica Fume (SF), Fly Ash (FA) and Posidonia oceanica Ash (PA). For each SCM, three mixtures were prepared, considering three different percentage substitutions of cement. An image analysis technique was applied to estimate the segregation in each sample. The results show that a substitution of cement by other materials with different grain size, considering a constant water binder ratio, may also result in a variation of the consistency of concrete and the viscosity of the mortar matrix, which may contribute to increase or reduce segregation.

Study on Properties of Lightweight Aggregate Concrete Characterized by Environment Protection

2013 ◽  
Vol 774-776 ◽  
pp. 940-943
Author(s):  
Jian Suo Ma ◽  
Huan Qin Cai ◽  
Jing Sun ◽  
Run Shan Bai
Keyword(s):  
Raw Materials ◽  
Lightweight Aggregate ◽  
Industrial Wastes ◽  
Lightweight Aggregate Concrete ◽  
Hardened Concrete ◽  
Lightweight Aggregates ◽  
Environment Protection ◽  
Aggregate Concrete ◽  
Good Workability ◽  
Multiphase Composite

To prepare concrete by applying industrial or agricultural wastes (energy saving materials) and natural lightweight aggregates, is a new pathway to develop lightweight aggregate concrete. The waste cornstalk, rubber particles made with industrial wastes, polyphenyl granules and natural pumice, as lightweight aggregates, are organically mixed with cement according to certain of proportion, so a kind of new multiphase composite lightweight aggregate concrete was prepared. The research results indicate that the raw materials after pretreatment can form good interfacial bonding with cements, improve further the performances of hardened concrete. The good workability, certain strength and low apparent density of concrete could be guaranteed.

Structural Lightweight Aggregate Concrete Containing High Volume Waste Materials

2013 ◽  
Vol 594-595 ◽  
pp. 498-502 ◽  
Author(s):  
Mahmud Hilmi ◽  
Payam Shafigh ◽  
Mohd Zamin Jumaat
Keyword(s):  
Negative Impact ◽  
Lightweight Aggregate ◽  
High Volume ◽  
Waste Materials ◽  
Lightweight Aggregate Concrete ◽  
Aggregate Concrete ◽  
Curing Conditions ◽  
Granulated Blast Furnace Slag ◽  
Structural Lightweight Aggregate Concrete ◽  
Cementing Material

The use of waste and by-product materials as aggregate or cement replacement in concrete can provide a solution to reducing the negative impact of the concrete industry. This paper reports an investigation to produce green concrete by using oil palm shell (OPS) as coarse lightweight aggregate as well as ground granulated blast furnace slag (GGBFS) as supplementary cementing material subjected to different curing conditions. Test results show that it is possible to produce green structural lightweight aggregate concrete containing 50% waste materials (by volume of concrete) with 28-day compressive strength of about 33 MPa. Data show that OPS concrete is very sensitive to curing, especially when GGBFS is used as a supplementary cementitious material.

Research on Influences of Activity Mineral Admixture on Workability and Mechanical Properties of High Strength Lightweight Aggregate Concrete

2011 ◽  
Vol 250-253 ◽  
pp. 861-865
Author(s):  
Xiang Dong ◽  
Jian Ming Gao ◽  
Ai Yu Hu
Keyword(s):  
Mechanical Properties ◽  
Low Cost ◽  
Lightweight Aggregate ◽  
High Strength ◽  
Industrial Wastes ◽  
Mineral Admixture ◽  
Lightweight Aggregate Concrete ◽  
Aggregate Concrete ◽  
Granulated Blast Furnace Slag ◽  
Better Than

Aiming at the high expense of high strength lightweight aggregate concrete (HSLWAC), low-cost HSLWAC was produced making use of the industrial wastes including fly-ash (FA) and ground granulated blast furnace slag (GGBS) as admixture, and the influences of these admixtures on the workability and mechanical properties of HSLWAC were studies. Result shows that HSLWAC whose cubic compressive strength is high to 70MPa at the age of 28d can be produced with mixing admixtures; the effect of mixing GGBS to the strength of HSLWAC is better than that of mixing FA; and mixing admixtures is useful for the improvement of the workability of HSLWAC; However, the brittleness of HSLWAC rises with the increase of its strength.

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