Evaluation of Coal Waste Ash and Rice Husk Ash on Properties of Pervious Concrete Pavement

Shafabakhsh, Gholamali; Ahmadi, Saeed

doi:10.5829/idosi.ije.2016.29.02b.08

Cited by 7 publications

(5 citation statements)

References 20 publications

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“…This enables it to form a highly dense calcium silicate hydrate (CSH) gel when the amorphous silica combines with free lime (Ca(OH)2) resulting in tremendous strength gain [41]. RHA generally results in an improvement in compressive strength, split tensile strength, and flexural strength at an optimal percentage addition of 8-10% [8,42]. Arum et al [10] also observed that RHA increases the setting time of concrete and improves its workability and porosity.…”

Section: Rice Husk Ashmentioning

confidence: 99%

“…One critical factor generally agreed upon, however, is that provision of proper guidelines, standards and adequate public awareness improves the adoption of pozzolans for industrial applications. Another U-test was conducted based on the null hypothesis that no significant difference exists between the opinions of those familiar with pozzolans (74) and those that are not (8). The results of the test showed that there was significant difference in some opinions, represented by codes P4, P5, P6, P9, P11, P12 (U = 80 to 169, ps < 0.05).…”

Section: Mann-whitney U Testmentioning

confidence: 99%

“…These key issues have brought about the need for alternatives for cement. Pozzolans have been identified as supplementary cementitious materials for partial replacement of ordinary Portland cement in concrete, and many research activities on the subjectmatter are still ongoing [4][5][6][7][8][9][10][11]. Examples of pozzolans include fly ash, ground granulated blast furnace slag (GGBS), rice husk ash (RHA), palm oil fuel ash (POFA), bamboo leaf ash (BLA) and many more.…”

Section: Introductionmentioning

confidence: 99%

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Challenges and Prospects of Widespread Adoption of Pozzolans for Building Construction: A Statistical Assessment

Omotayo

Arum

2022

IJE

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Pozzolans are supplementary cementitious materials (SCMs) that many researchers have found suitable for partial replacement of cement in concrete in order to reduce the environmental hazards and energy consumption involved in the production of concrete. However, these materials have been seldomly used in the present day construction industry especially in Nigeria, in spite of notable research efforts on them over the past decade and abundance of evidence to support their tremendous benefits. A question therefore naturally arises: What is responsible for the hesitation in applying pozzolans widely in the construction industry? This paper investigated by means of a research survey the reasons for their low acceptance and adoption by stakeholders in the construction industry. Opinions from 82 respondents of impressive involvement in the construction industry were collated and statistically analyzed using nonparametric tests, namely Cronbach's Alpha Reliability, Kruskal-Wallis H and Mann-Whitney U tests. The results of the analyses affirmed that pozzolans are effective in mitigating the negative environmental effects caused by using conventional cement in concrete. It further revealed that notable factors militating against their adoption in the construction industry include unavailability of relevant mixture design standards for pozzolanic concrete, lack of commercial production of pozzolanic concrete, unavailability of sufficiently skilled professionals on pozzolan application, inadequate public awareness, lack of policies recommending and guiding its use, and fears on results achievable with use of pozzolans. Respondents generally agreed that development of proper guidelines and standards, as well as adequate public awareness will favour wide acceptance and industrial application of pozzolans.

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Section: Rice Husk Ashmentioning

confidence: 99%

Section: Mann-whitney U Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Challenges and Prospects of Widespread Adoption of Pozzolans for Building Construction: A Statistical Assessment

Omotayo

Arum

2022

IJE

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“…Pervious concrete is a composite of cement, coarse aggregates, few to no fine aggregates, water (1), and other admixtures, additives, or organic or recycled materials as substitutes for aggregates (2,3). Its first use in water purification can be traced back to last decades, when Park and Tia (4) stated about the application of ecoconcrete as a water purifier.…”

Section: Introductionmentioning

confidence: 99%

Leaching Potential and Effectiveness of Pervious Mortar Filters in Bacteria and Turbidity Removal from Surface Water

Yogafanny,

Triatmadja,

Nurrochmad

et al. 2024

IJE

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A pervious mortar filter (PMF) is a modification of pervious mortar and pervious concrete designed as a water filter that, based on its physical characteristics, can reduce turbidity and bacteria. However, chemically, it contains minerals that can dissolve upon contact with water and be found in effluent. This study aimed to determine the performance of PMF in treating surface water by reducing turbidity and Escherichia coli and to assess its leaching potential. PMF specimens were created by mixing sand (0.6-0.85 mm), cement, and water with sand-to-cement ratios (M) of 4 and 5 and a water-to-cement ratio (w/c) of 0.4. Each mixture was then molded into pipes with a diameter of 8.2 cm and different thicknesses: 3, 5, and 10 cm. Raw surface water was used for the performance and leaching tests. Results showed that PMF effectively removed 95% turbidity and 99.71% E. coli, which increased with the filtration duration. PMF reduced E. coli more effectively when designed with a thickness of 10 cm than 5 or 3 cm because it would provide more surface areas for suspended solids and bacteria to attach and be retained. More substantial increases (mean %) of pH, hardness, calcium ions, and TDS were observed in PMF M4 with a thickness of 10 cm than in thinner ones because it contained more cement that would dissolve when in contact with water.

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“…To study the effect of FA and RHA along with ordinary Portland cement (OPC) on early age shrinkage of triple blend concrete using cementetious material particle packing approach is an interest in this research work. The ternary blend concrete was preferred for making sustainable high strength concrete and durable concrete using cementitious material [11,14]. Many of the waste byproduct producec from industries such as GGBS, slag, slurry, fly ash etc.…”

Section: Introductionmentioning

confidence: 99%

Early Age Shrinkage Behavior of Triple Blend Concrete

Kanthe

Deo

Murmu

2020

IJE

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The early age shrinkage is responsible for the early age cracking of concrete. It is very critical for durability of concrete. The change in volume of concrete due to evaporation of water or dehydration process is known as shrinkage. To reduce the early age shrinkage utilized the supplementary cementitious material (SCM) in concrete. In present research industrial and agricultural waste byproduct like fly ash (FA) and rice husk ash (RHA) along with cement were used as SCM. The triple blend concrete was prepared by the combination of 20%, 30% and 40% partial cement replacement with FA and RHA for 0.30, 0.35 and 0.40 water-cement ratio. The concrete samples were tested by advanced instrument as shrinkage cone meter were used for measure the shrinkage. The result shows that the early age shrinkage reduced with increasing the SCM content. The microstructure characteristics enhanced with raising the content of FA and RHA up to 30% replacement; that was due to the dense particle packing.

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Evaluation of Coal Waste Ash and Rice Husk Ash on Properties of Pervious Concrete Pavement

Cited by 7 publications

References 20 publications

Challenges and Prospects of Widespread Adoption of Pozzolans for Building Construction: A Statistical Assessment

Challenges and Prospects of Widespread Adoption of Pozzolans for Building Construction: A Statistical Assessment

Leaching Potential and Effectiveness of Pervious Mortar Filters in Bacteria and Turbidity Removal from Surface Water

Early Age Shrinkage Behavior of Triple Blend Concrete

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