Investigation on the properties of porous concrete as road base material

Xu, Guangyou; Shen, Weiguo; Huo, Xujia; Yang, Zhifeng; Wang, Jing; Zhang, Wensheng; Ji, Xiaoli

doi:10.1016/j.conbuildmat.2017.09.151

Cited by 98 publications

(25 citation statements)

References 39 publications

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“…This explains why water absorption in concrete bricks is lesser than paperbricks. Howbeit samples infused with 1 and 2 wt% fibers which were cured for 56 days still fell within the standard requirements as enshrined in 55 . Natural fibers have been reported to be prone to water retention.…”

Section: Resultsmentioning

confidence: 88%

Influence of alkaline modification on selected properties of banana fiber paperbricks

Akinwande

Adediran

Balogun

et al. 2021

Sci Rep

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In a bid to develop paper bricks as alternative masonry units, unmodified banana fibers (UMBF) and alkaline (1 Molar aqueous sodium hydroxide) modified banana fibers (AMBF), fine sand, and ordinary Portland cement were blended with waste paper pulp. The fibers were introduced in varying proportions of 0, 0.5, 1.0 1.5, 2.0, and 2.5 wt% (by weight of the pulp) and curing was done for 28 and 56 days. Properties such as water and moisture absorption, compressive, flexural, and splitting tensile strengths, thermal conductivity, and specific heat capacity were appraised. The outcome of the examinations carried out revealed that water absorption rose with fiber loading while AMBF reinforced samples absorbed lesser water volume than UMBF reinforced samples; a feat occasioned by alkaline treatment of banana fiber. Moisture absorption increased with paper bricks doped with UMBF, while in the case of AMBF-paper bricks, property value was noted to depreciate with increment in AMBF proportion. Fiber loading resulted in improvement of compressive, flexural, and splitting tensile strengths and it was noted that AMBF reinforced samples performed better. The result of the thermal test showed that incorporation of UMBF led to depreciation in thermal conductivity while AMBF infusion in the bricks initiated increment in value. Opposite behaviour was observed for specific heat capacity as UMBF enhanced heat capacity while AMBF led to depreciation. Experimental trend analysis carried out indicates that curing length and alkaline modification of fiber were effective in maximizing the properties of paperbricks for masonry construction.

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Section: Resultsmentioning

confidence: 88%

Influence of alkaline modification on selected properties of banana fiber paperbricks

Akinwande

Adediran

Balogun

et al. 2021

Sci Rep

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“…e shrinkage ratio (ε i ) was measured at each curing age and calculated according to equation (1). ree prism specimens were measured for each data point [26]. After the test, the sample was weighed, and the water loss rate was calculated:…”

Section: Test Methodsmentioning

confidence: 99%

Modification of Lime‐Fly Ash‐Crushed Stone with Phosphogypsum for Road Base

Zhang

Cheng

Lei

et al. 2020

Advances in Civil Engineering

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In order to increase the recycling of phosphogypsum waste, this study explored the feasibility of using phosphogypsum to replace some of the lime and aggregate in the lime-fly ash-crushed stone mixture which is a widely used road base material in China. For this purpose, compaction, compressive strength, composition structures, wetting-drying cycle tests, and shrinkage tests were carried out on the lime-fly ash-phosphogypsum-crushed stone composite to investigate its performance. The results indicate that lime-fly ash-crushed stone modified with phosphogypsum has the required strength of the road base material and favourable performances in environment (wetting-drying cycle) stability. The image processing analysis and shrinkage tests demonstrated that phosphogypsum can significantly improve the compactness and shrinkage performance of lime-fly ash-crushed stone mixture. A suitable content of phosphogypsum and a reasonable content of fine aggregate are conducive to improving the roadway engineering properties (i.e., decreasing shrinkage cracks and increasing compressive strength) of lime-fly ash-phosphogypsum-crushed stone composites.

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“…As porosidades (total e efetiva) dos concretos também foram calculadas para a análise do desempenho hidráulico, utilizando-se cubos de dimensões 10cm x 10cm x 10cm extraídos das placas. Para determinar a porosidade total (υt), empregou-se a equação 3 (XU et al,2018), na qual são relacionadas as densidades reais (ρs) e teórica (ρt), ambas expressas em g/cm³. Para determinar a porosidade efetiva (υe) são relacionadas as massas seca (m1) e saturada (m2) da amostra em gramas, determinadas a partir da secagem em estufa e submersão por 24 horas, o volume (v) da amostra em centímetro cúbico e a massa específica da água (ρw) em gramas por centímetro cúbico, conforme expresso na equação 4.…”

Section: Peneiraunclassified

“…Na Figura 7 é possível verificar que existe coerência entre esta correlação e os demais resultados. Observa-se que K cresce exponencialmente em função do aumento da porosidade efetiva, correlação que apresenta R² com valor superior ao obtido por Xu et. al (2018).…”

Section: B) C) A)unclassified

Avaliação dos processos de mistura de concretos permeáveis com seixo

Cordeiro

Freitas

Cordeiro

et al. 2021

RSD

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A crescente impermeabilização dos espaços urbanos traz consigo problemas e desastres ambientais como as inundações, em decorrência da alteração na dinâmica da água da chuva que infiltrava e passa a escoar, exigindo a maior capacidade dos sistemas de micro e macrodrenagem. O concreto permeável (CPER), composto por cimento Portland e agregado graúdo, ganha espaço como forma de mitigar os efeitos da redução das áreas permeáveis. Nesse contexto, o presente trabalho busca investigar a influência da sequência de mistura no comportamento hidráulico e mecânico do CPER produzido com seixo rolado, dada a existência de lacunas na literatura sobre o impacto desse parâmetro sobre material. Para tal, foram estudadas três sequências de misturas a partir da produção de placas de CPER de dimensões 40cmx40cmx10cm. Foram analisados os resultados de resistência à tração na flexão, porosidade, tortuosidade e permeabilidade. Estatisticamente, não foram verificadas diferenças entre os resultados, entretanto, observou-se o crescimento do volume e da área de poros, alterando-se as sequencias, quando utilizado na produção dos concretos um misturador de eixo inclinado.

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Investigation on the properties of porous concrete as road base material

Cited by 98 publications

References 39 publications

Influence of alkaline modification on selected properties of banana fiber paperbricks

Influence of alkaline modification on selected properties of banana fiber paperbricks

Modification of Lime‐Fly Ash‐Crushed Stone with Phosphogypsum for Road Base

Avaliação dos processos de mistura de concretos permeáveis com seixo

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