Lightweight Aggregate Concrete Microstructure

Chandra, Sulekh; Berntsson, Leif

doi:10.1016/b978-081551486-2.50009-2

Cited by 102 publications

(91 citation statements)

References 11 publications

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“…In particular, LWAs can be used to replace ordinary aggregates to produce lightweight aggregate concrete (LWAC). The unit weight of LWAC is about two-thirds or less than that of conventional concrete [2]. Therefore, the use of LWAC can reduce a structure's weight by more than 20%, and can effectively reduce the seismic load [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…In other words, industrial waste or municipal solid waste can be reused as a sustainable resource in the manufacturing process of artificial LWAs. After the successful production of artificial LWAs, natural LWAs with poor quality stability were gradually replaced by artificial LWAs [2,[8][9][10][11]. In particular, LWAs can be used to replace ordinary aggregates to produce lightweight aggregate concrete (LWAC).…”

Section: Introductionmentioning

confidence: 99%

“…Lightweight aggregates (LWAs) can be roughly divided into two types: natural aggregates and artificial aggregates [1,2]. In recent years, the development of LWAs has focused on industrial waste or municipal solid waste as a raw material for reducing the use of natural resources [3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Engineering Properties of Self-Consolidating Lightweight Aggregate Concrete and Its Application in Prestressed Concrete Members

Chen

Tang

et al. 2018

Sustainability

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Self-consolidating lightweight aggregate concrete (SCLC) is a highly flowable and lightweight concrete. In this study, the properties of SCLC and prestressed SCLC members were tested and compared with those made of normal-weight self-consolidating concrete (SCC). The test results show that SCLC can be used for prestressed concrete members. The use of lightweight aggregates with a particle density larger than 1100 kg/m 3 can avoid the serious segregation of fresh concrete. In addition, the SCLC designed in this study can meet most of the SCC Rank 2 test standards, except for the V-funnel test. The water contained in the lightweight aggregates supplied sustained curing, so the level of drying shrinkage of the SCLC was lower than that of the conventional SCC. However, the level of creep of the SCLC was higher than that of the conventional SCC, because normal-weight aggregates are more able to inhibit the change of the concrete's volume. On-site test results show that after 180 days of prestressing, the prestress loss was about 5.35-6.83% for the full-size SCLC members, which was smaller than that for the conventional SCC members (about 8.19-9.06% loss).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Engineering Properties of Self-Consolidating Lightweight Aggregate Concrete and Its Application in Prestressed Concrete Members

Chen

Tang

et al. 2018

Sustainability

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“…Estudos preliminares indicam a viabilidade de produção e utilização desse tipo de agregado leve na construção civil, utilizando-se os polos produtivos de cerâmica vermelha espalhados por todo o território nacional [7,8,9,10].…”

Section: Introductionunclassified

“…Já o módulo de deformação dos concretos leves está diretamente relacionado com a resistência à compressão, a quantidade de agregado e a zona de transição agregado-matriz [10,1].…”

Section: Introductionunclassified

Influência dos agregados leves de argila calcinada nas propriedades mecânicas de concretos estruturais

Santis¹,

Rossignolo²

2015

Matéria (Rio J.)

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RESUMOEste trabalho tem por objetivo a avaliação da influência dos agregados leves de argila calcinada nas propriedades mecânicas de concretos estruturais. Os agregados leves de argila calcinada foram produzidos pelo processo de extrusão, com valores de umidade próximos dos limites de plasticidade das massas cerâmicas. Após a confecção dos agregados leves de argila calcinada, foram confeccionados corpos de prova de concreto com agregados leves de argila calcinada, argila expandida e basalto. Os concretos foram submetidos aos ensaios de massa específica e abatimento do tronco de cone, no estado fresco e de resistência à compressão, resistên-cia à tração por compressão diametral, módulo de deformação e massa específica no estado endurecido. Os resultados desta pesquisa indicaram que os agregados tem grande influência nas propriedades mecânicas dos concretos, sendo que os agregados leves de argila calcinada apresentaram características e desempenho intermediários quando comparados aos agregados leves de argila expandida e agregados convencionais (basalto). Palavras-chave:Agregados leves de argila calcinada, concretos leves, concretos estruturais. ABSTRACTThis paper aims to evaluate the influence of calcined clay lightweight aggregates on the mechanical properties of structural concretes. Lightweight aggregates were extruded with moisture content close to their plastic limits. After the manufacture of calcined clay lightweight aggregates, concrete specimens were made using calcined clay lightweight aggregates, expanded clay and basalt. Specimens were characterized by fresh specific mass, slump test (fresh condition), compressive strength, tensile strenth, modulus of elasticity and specific mass (cured state). Results of this research indicates that aggregates have great influence on the mechanical properties of concretes and calcined clay lightweight aggregates showed intermediated characteristics when compared with expanded clay and basalt aggregates.

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Review on Application of Lightweight Cenosphere in Construction Material

Zanjad,

Pawar,

Nayak

2024

Macromolecular Symposia

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There are many industrial waste products used in the construction industry like rice husk ash, fly ash phosphogypsum, marble powder, cenosphere, silica fume, copper slag, granulated blast furnace slag, etc. It is observed that the use of all waste materials is beneficial for improving the properties of cement concrete and also making a hunk of lightweight cement concrete. In that material, the cenosphere is the most economical material in the construction industry, so both waste materials are used in most of the experimental works. This review focuses on the concrete prepared by replacing cement and fine aggregate with the cenosphere at various percentages for the preparation of lightweight cement concrete. The usual way to use cenosphere is up to 30% replacement as fine aggregate or 20% replacement of cement gives good results. These reviews discuss the usability and extraction of cenosphere from fly ash, its properties, and applications. Also observed are the final optimum percentages for compressive strength, split tensile strength, and flexural strength for 7, 14, and 28 days.

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Lightweight Aggregate Concrete Microstructure

Cited by 102 publications

References 11 publications

Engineering Properties of Self-Consolidating Lightweight Aggregate Concrete and Its Application in Prestressed Concrete Members

Engineering Properties of Self-Consolidating Lightweight Aggregate Concrete and Its Application in Prestressed Concrete Members

Influência dos agregados leves de argila calcinada nas propriedades mecânicas de concretos estruturais

Review on Application of Lightweight Cenosphere in Construction Material

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