Properties of sustainable lightweight pervious concrete containing oil palm kernel shell as coarse aggregate

Khankhaje, Elnaz; Salim, Mohd Razman; Mirza, Jahangir; Hussin, Mohd Warid; Rafieizonooz, Mahdi

doi:10.1016/j.conbuildmat.2016.09.010

Cited by 79 publications

(45 citation statements)

References 27 publications

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“…Moreover, the poor bond between cement pastes with fibers may lead to the reduction in compressive strength. The other reason reported was that the hollow side of shell was difficult to fill with cement paste whereas the amount of cement paste in concrete is limited [11]. Furthermore, the compressive and splitting tensile strength of shotcrete mixture seemed to be higher than that of casting concrete, which may be caused by the compacted effect of spraying force [68].…”

Section: Results Of Compressive and Splitting Tensile Strengthmentioning

confidence: 92%

“…Khankhaje et al [11] found that the fresh density was slightly higher than the hardened density and both showed a good relationship to each other. The difference of density between cast and sprayed mixes was not significant, except for few extreme cases [60].…”

Section: Density and Compressive Strength Relationshipmentioning

confidence: 99%

“…According to the specification from ACI [61] and ASTM [62], the density of structural lightweight concrete should be less than 2000 kg/m 3 . In addition, lightweight concrete is classified with a density ranging from 1314 kg/m 3 to 1777 kg/m 3 [11]. Thus, the range of density of specimens in these tests was close to the requirement of lightweight concrete.…”

Section: Density and Compressive Strength Relationshipmentioning

confidence: 99%

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Pet Fiber Reinforced Wet-Mix Shotcrete with Walnut Shell as Replaced Aggregate

2017

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Abstract:In the rapidly developing modern society, many raw materials, such as crushed limestone and river sand, which are limited, are consumed by the concrete industry. Naturally, the usage of waste materials in concrete have become an interesting research area in recent years, which is used to reduce the negative influence of concrete on the environment. Hence, this paper presents the development of a sustainable lightweight wet-mix shotcrete by replacing natural coarse gravel with a kind of byproduct, nut shell (walnut). Fibers made from dumped polyethylene terephthalate (PET) bottles were mixed in the composite to improve the properties of the lightweight wet-mix shotcrete. The initial evaluation of the fresh concrete mixed with different volume fraction of walnut shell was carried out in terms of its performance capacities of mechanical properties (i.e., tensile and compressive strength), pumpability and shootability (i.e., slump, pressure drop per meter and rebound rate) and the results were compared with plain concrete. With increase of walnut shell, compressive and splitting tensile strength of casting concrete decreased, while slump and pressure drop reduced slightly. Additionally, appropriate dosage of walnut shell can improve the shootability of fresh concrete with low rebound rate and larger build-up thickness. In the second series tests, polypropylene (PP) fiber and multi-dimension fiber were also mixed in composite for comparative analysis. After mixing fibers, the splitting tensile strength had obtained marked improvement with slight reduction of compressive strength, along with acceptable fluctuation in terms of pumpability and shootability. Furthermore, relation of density and compressive strength, relation of rebound and density, build-up thickness and relation of compressive and splitting tensile strength were discussed. This study found wet-mix shotcrete incorporating PET fiber with walnut shell of about 35% coarse aggregate replacement could be used for roadway support as lightweight shotcrete per requirements of mine support.

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Section: Results Of Compressive and Splitting Tensile Strengthmentioning

confidence: 92%

Section: Density and Compressive Strength Relationshipmentioning

confidence: 99%

Section: Density and Compressive Strength Relationshipmentioning

confidence: 99%

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Pet Fiber Reinforced Wet-Mix Shotcrete with Walnut Shell as Replaced Aggregate

2017

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“…Finally, some mixtures had manually cement amounts added, varying their AV. Table 1 represents the main parameters reviewed and used for designing PC mixtures and Table 2 shows the parameters found in the literature reviewed for each component in PC [5,6,[8][9][10][11]26]. Three mixtures with the DCP and the ACI 522R-10 normative were made in order to compare both methodologies, employing the same w/c ratio (0.40) and three s/c ratios (0.00, 0.50 and 1.00).…”

Section: Pavement Designmentioning

confidence: 99%

“…The coarse aggregate gradation used for PC leads to a higher amount of air voids (AV), around 15-30%. Allowing infiltration [4][5][6][7][8][9][10][11][12][13]. The binder is made of a cementitious paste, integrated mainly by cement, water and, in some cases, fine aggregate (sand) [14,15].…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Porous Concrete Urban Pavements for a More Sustainable and Resilient Future

Elizondo-Martínez

Andrés‐Valeri

Juli-Gándara

et al. 2018

The 2nd International Research Conference on Sustainable Energy, Engineering, Materials and Environment

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Many cities around the world are handling many problems derived from urbanization, resulting in an uncontrolled growth of cities. Moreover, Climate Change effects are affecting all countries and specially cities. In this context, urban drainage and paving strategies demand a bigger economical investment to avoid a great impact in citizens quality of life, and in the environment. The main objective of this research is to contribute, in an innovative way, with the construction of concrete urban pavements by studying, quantifying and trying to join together a series of characteristics and benefits that are analyzed nowadays, but in a separately way. Trying to achieve an integrated pavement, with resilient properties (adapted to Climate Change) and more sustainable (economically, socially and environmentally).

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