Properties of recycled PVC aggregate concrete under different curing conditions

Haghighatnejad, Nikoo; Mousavi, S. Yasin; Khaleghi, Seyed Jalal; Tabarsa, Alireza; Yousefi, Saman

doi:10.1016/j.conbuildmat.2016.09.047

Cited by 59 publications

(24 citation statements)

References 14 publications

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“…This is due to the accumulation of water around the PVC particles caused by the hydrophobic surface nature of PVC particles which leads to the formation of a weak bond between the cement matrix and PVC particles. In a similar study, Haghighatnejad et al [34] reported that adding recycled PVC as partial substitution of coarse aggregate reduced the splitting tensile strength of concrete. The 28 days age splitting tensile strength of control specimen concrete was measured to be 3.84 MPa, this value was decreased by 3.5%, 6.7%, 14.1%, and 24.2% with the substitution ratio of 20%, 30%, 40%, and 50% of recycled PVC aggregate respectively.…”

Section: Splitting Tensile Strengthmentioning

confidence: 90%

Cementitious materials incorporating waste plastics: a review

Mahmood

Koçkal

2020

SN Appl. Sci.

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Plastics in all forms have invaded a large area of our daily life. Increased demand for plastics in the last decays has led to severe environmental issues due to the accumulation of plastic-related waste. This situation has provided scientists with a new research area to work on the properties and study the possible use of recycled plastics as a new generation of construction materials. In recent years, many studies have been conducted regarding the usage of plastic particles. Most of the studies focus on the methods of recycling and disposing of waste plastic materials in an environmentally friendly way. This paper is a review of published research articles on the incorporation of waste plastic materials in cementitious mixtures. Fresh, mechanical, and durability-related properties of composites containing plastic particles have been reviewed based on the current literature.

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Section: Splitting Tensile Strengthmentioning

confidence: 90%

Cementitious materials incorporating waste plastics: a review

Mahmood

Koçkal

2020

SN Appl. Sci.

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“…Some types of plastic previously used as aggregates in concrete mixtures include high density polyethylene (HDPE) [11], [12], polyethylene terephthalate (PET) [4], [9], [13]- [17], polyvinyl chloride (PVC) [18], [19], polypropylene (PP) [20], and electronic wastes (e-wastes) [21], [22].…”

Section: Introductionmentioning

confidence: 99%

The Influence of River and Volcanic Sand as Coatings on Polypropylene Waste Coarse Aggregate Towards Concrete Compressive Strength

et al. 2020

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One of the most important factors used to determine the compressive strength of concrete is its aggregate and matrix adhesion. This study examines the surface properties of polypropylene (PP) waste coarse aggregate (PWCA) to determine the influence of sand. The PWCA was made from the PP waste and different types of coating such as PWCA-R (river sand) and PWCA-V (volcanic sand), with experimental tests conducted on the physical properties of sand and PWCA, while the compressive strength, FESEM and density of polypropylene waste coarse aggregate concrete (PWCAC). Concrete specimens were prepared by replacing natural coarse aggregate with PWCA in percentages of 0%, 25%, 50%, 75%, and 100%, varying the water-cement ratio by 0.3 and 0.42 and using polypropylene (PP) waste coarse aggregate (PWCA-R and PWCA-V) as the coating material. The results showed that fineness modulus (F.M) and water absorption of the river sand was higher compared to volcanic sand. The PWCA-V had higher density and specific gravity compared to PWCA-R. On the other hand, water absorption of the PWCA-V was lower than PWCA-R. The PWCA concrete had density which varies from 1740 kg/m3 to 2074 kg/m3. For both, the PWCA concrete compressive strength at 28 days with a 100% replacement ratio was reduced by 43% to 55% compared to the natural coarse aggregate (NCA) concrete with 0.3 and 0.42 water-cement ratios. Also, the structural efficiency of PWCAC decreased with an increase in replacement ratio. River sand adhered to the PWCA surface resulted in a better compressive strength value compared to the volcanic sand.

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“…Kou et al [6] used recycled PVC pipe particles and expanded clay to make nonload-bearing lightweight concrete, which has the good properties of low density, high ductility, low shrinkage, and high resistance to chloride ion permeability. Haghighatnejad et al [7] studied the performance of concrete by replacing sand with the same volume of PVC aggregates under different curing conditions, and they believed that the incorporation of PVC aggregates could decrease the mechanical properties of concrete. Al-Tayeb et al [8] used vehicle waste plastics as replacement aggregates, finding that the impact resistance significantly improved with the increase of the mixing amount under low-speed impact load.…”

Section: Introductionmentioning

confidence: 99%

“…e experimental results show that PVC powder can decrease the rutting depth of asphalt and effectively improve the durability of asphalt pavement. By comprehensively analyzing the study results, we found that the strength of plastic modified concrete decreased significantly and the water absorption increased because of the sidewall effect in the interfacial transition zone between cement and plastic aggregate and poor bonding effect [3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Preparation, Performance Test, and Microstructure of Composite Modified Reinforced Concrete

2020

Advances in Civil Engineering

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To investigate whether the compound modification means which mixes modified Polyvinyl chloride (PVC) aggregate and polypropylene fiber in concrete could gain “positive hybrid effect” and cope with more sophisticated engineering circumstances, four groups of test specimens were prepared: concrete doped with unmodified PVC aggregate, concrete doped with modified PVC aggregate, concrete doped with unmodified PVC aggregate and polypropylene fiber, and concrete doped with modified PVC aggregate and polypropylene fiber. The fiber content is 0.9 kg/m3, the modified solution content is 1 mol/L NaOH, and the replacement amount of PVC fine aggregate in replacement sand is 0%, 5%, 10%, 20%, and 30%. Mechanical property and durability tests were carried out to compare and analyze the measured compressive strength, splitting tensile strength, flexural tensile strength, water absorption rate, and impact failure energy. Moreover, scanning electron microscopy and XRD diffraction were used to analyze micromorphology and crystal structure of concrete. The test results demonstrate that as the content of PVC aggregate increases, the compressive strength, splitting tensile strength, and flexural tensile strength of the concrete decrease significantly, while the brittleness is improved. Meanwhile, the water absorption rate increases and the impact resistance shows an approximately linear increase trend. Under the same content of PVC aggregate, the most effective way to improve compressive strength is to use modified PVC aggregate. The rapid decrease of compressive strength caused by PVC aggregate can be effectively delayed by doping polypropylene fiber and modified PVC aggregate. Adding polypropylene fiber or using the modified PVC aggregate can improve the brittleness, tensile strength, flexural tensile strength, and impact resistance, but they have different modification and reinforcement effects. The concrete prepared by doping polypropylene fiber and modified PVC aggregate has better performance in tensile strength, flexural tensile strength, brittleness, and impact resistance, and the water absorption and the compressive strength of the concrete are enhanced compared with the normal group. Therefore, composite modified reinforced concrete doped with modified PVC aggregate-polypropylene fiber has broad application prospects.

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Properties of recycled PVC aggregate concrete under different curing conditions

Cited by 59 publications

References 14 publications

Cementitious materials incorporating waste plastics: a review

Cementitious materials incorporating waste plastics: a review

The Influence of River and Volcanic Sand as Coatings on Polypropylene Waste Coarse Aggregate Towards Concrete Compressive Strength

Preparation, Performance Test, and Microstructure of Composite Modified Reinforced Concrete

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