Development of a cementless eco-binder as an alternative to traditional Portland cement in construction activities

Phuoc, Huynh Trong; Hùng, Vũ Văn; Tuấn, Bùi Lê Anh; Giang, Pham Huu Ha

doi:10.31814/stce.nuce2020-14(3)-04

Cited by 7 publications

(4 citation statements)

References 13 publications

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“…Nevertheless, cement production causes unexpected problems for the environment, which has received much attention in recent years. In detail, producing PC emits a high amount of carbon dioxide into the environment [4,5] as the progress of making 1 ton of PC discharges about 1 ton of carbon dioxide [6]. In addition, the production process of PC consumes a large amount of energy (about 1800 MJ for every ton of clinker [7] and about 3500 MJ for every ton of PC produced [8]).…”

Section: Introductionmentioning

confidence: 99%

Development and evaluation of short-term strength and durability characteristics of an eco-friendly sulfate-activated binder

Cao

Nguyen

Luu

et al. 2022

STCE

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The potential use of locally sourced ground granulated blast-furnace slag (GGBFS) and commercial sodium sulfate (Na2SO4) in the development of an eco-friendly sulfate-activated binder (SAB) was investigated in this study. The influence of Na2SO4 contents (1.5, 3.0, 4.5, 6.0, and 7.5% by mass of GGBFS) as a crucial sulfate activator on mechanical strength and durability performance of the SAB samples was evaluated through the tests of compressive strength, porosity, chloride ion penetration, and ultrasonic pulse velocity. The correlations among these properties were also established and discussed. The experimental results show that the Na2SO4 content had significant influences on both the strength and durability of the SAB samples. The porosity and chloride ion penetration were reduced as increasing the Na2SO4 content. Meanwhile, increasing the Na2SO4 content increased the compressive strength and ultrasonic pulse velocity of the SAB samples. Furthermore, the test results point out that using 7.5% Na2SO4 provided a significant improvement in the mechanical strength and durability performance of the newly developed SAB.

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Section: Introductionmentioning

confidence: 99%

Development and evaluation of short-term strength and durability characteristics of an eco-friendly sulfate-activated binder

Cao

Nguyen

Luu

et al. 2022

STCE

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“…Re-utilization of these kinds of wastes as usable construction materials is an effective approach and also further brings economic benefits. In Vietnam, for instance, several studies have carried out to investigate the application of various industrial wastes such as unground rice husk ash [7], fly ash and residual rice husk ash [8], ground granulated blastfurnace slag, and circulating fluidized bed combustion ash [9] as construction materials. However, the use of waste bottom ash from incineration plants (IBA) as source material for producing construction materials has been limited.…”

Section: Introductionmentioning

confidence: 99%

Recycling of waste incineration bottom ash in the production of interlocking concrete bricks

Nguyen

Phuoc

Phieu

et al. 2021

STCE

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This study presents an experimental investigation on the recycling of waste incineration bottom ash (IBA) as a fine aggregate in the production of interlocking concrete bricks (ICB). Before being used, the concentration of heavy metal in IBA was determined to confirm it is a non-toxic material. In this study, the IBA was used to replace crushed sand (CSA) in the brick mixtures at different replacement levels of 0%, 25%, 50%, 75%, and 100% (by volume). The ICB samples were checked for dimensions, visible defects, compressive strength, bending strength, water absorption, and surface abrasion in accordance with the related Vietnamese standards. The test results demonstrated that the IBA used in this study was a non-toxic material, which can be widely used for construction activities. All of the ICB samples prepared for this study exhibited a nice shape with consistent dimensions and without any visible defects. The incorporation of IBA in the brick mixtures affected engineering properties of the ICB samples such as a reduction in the compressive strength and bending strength and an increment in water absorption and surface abrasion of the brick samples. As a result, the compressive strength, bending strength, water absorption, and surface abrasion values of ICB samples at 28 days were in the ranges of 20.6 – 34.9 MPa, 3.95 – 6.62 MPa, 3.8 – 7.2%, and 0.132 – 0.187 g/cm2, respectively. Therefore, either partial or full replacement of CSA by IBA, the ICB with grades of M200 – M300 could be produced with satisfying the TCVN 6476:1999 standard in terms of dimensions, visible defects, compressive strength, water absorption, and surface abrasion. These results demonstrated the high applicability of the local IBA in the production of the ICB for various construction application purposes. Keywords: interlocking concrete brick; waste incineration bottom ash; visible defect; compressive strength; bending strength; water absorption; surface abrasion.

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“…While some studies investigated the use of rice husk as a component in fired -clay bricks [18][19][20][21], others used rice husk ash in the production of unburnt bricks [1,22]. It is noticed that ground rice husk ash can be used as binder materials [1,[22][23][24], whereas unground rice husk ash can be used as fine aggregate [1,22]. Most of test results indicated that both the unit weight and compressive strength of bricks reduced, but the water absorption of bricks increased with the increase in rice husk content.…”

Section: Introductionmentioning

confidence: 99%

Environmentally friendly unburnt bricks using raw rice husk and bottom ash as fine aggregates: Physical and mechanical properties

Huy¹,

Tan²,

Hang³

et al. 2021

STCE

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In order to reduce the serious impacts of industrial and agricultural wastes on the environment, raw rice husk and bottom ash were used as fine aggregates, while fly ash was utilized as a binder material in the production of unburnt building bricks. Two group mixtures were designed with water-to-binder (W/B) ratios of 0.30 and 0.35. The rice husk was used to replace 0%, 3%, 6%, and 9% of bottom ash content by mass. An experimental program was carried out on the brick samples at different ages from 3-day to 28-day to determine the main physical and mechanical properties of brick, such as unit weight, compressive strength, water absorption, ultrasonic pulse velocity and thermal conductivity. The microstructure of brick material was captured using scanning electron microscope technique. The experimental results allow to identify the effects of rice husk, bottom ash content as well as W/B ratio on the properties of bricks. Brick samples produced in this study had a proper compressive strength meeting the practice requirement and were classified as Grade M3.5 and 5.0 based on TCVN 6477:2016. At the use of 9% rice husk, the unit weight and thermal conductivity of bricks were really low (1.06÷1.08 T/m3 and 0.201÷0.216 W/m.K), they are conformed to be used in temporary construction and insulation structures. Keywords: rice husk; bottom ash; fly ash; unburnt brick; ultrasonic pulse velocity; thermal conductivity.

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Development of a cementless eco-binder as an alternative to traditional Portland cement in construction activities

Cited by 7 publications

References 13 publications

Development and evaluation of short-term strength and durability characteristics of an eco-friendly sulfate-activated binder

Development and evaluation of short-term strength and durability characteristics of an eco-friendly sulfate-activated binder

Recycling of waste incineration bottom ash in the production of interlocking concrete bricks

Environmentally friendly unburnt bricks using raw rice husk and bottom ash as fine aggregates: Physical and mechanical properties

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