Studies on γ-irradiated polymer–nano calcined clay blended cement mortar composites

Ismail, M. R.; Abdel-Rahman, H.A.; Younes, M.M.; Ismail, Mohamed R.; El‐Hamouly, S. H.

doi:10.1016/j.jiec.2012.09.003

Cited by 20 publications

(11 citation statements)

References 25 publications

(34 reference statements)

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“…Therefore, it has a particle size ≤ 40 μm, specific surface area (Blaine) 340 m 2 /kg, and water absorption 0.07%. In agreement with ASTM C618‐02, which requires a sum of SiO 2 + Al 2 O 3 + Fe 2 O 3 higher than 70% for good pozzolan, the sum for the investigated sample of glass is 73% . It can be classified as Class N natural pozzolan and therefore, it is likely to produce good pozzolan.…”

Section: Methodssupporting

confidence: 72%

“…The hydrated products increase with increasing hydration age leading to an increase in the pH values reaching around 12–13. The calcium silicate hydrate (C–S–H) gel formed is precipitated in the porous system of the specimens and fill the spaces between the cement grains forming bridges between them, thereby caused a stiffening of the specimens and its subsequent hardening . The continuous formation of the gel that gradually fill the capillary pores, as well as the cohesion force acting between the gel particles; led to the formation of more chemical bonds and as a result, the solid parts inside the specimen increased leading to more stiffening.…”

Section: Resultsmentioning

confidence: 99%

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Effect of waste glass content on the physico‐chemical and mechanical properties of styrene acrylic ester blended cement mortar composites

2016

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This study focuses on the partial substitution effect of ordinary Portland cement (OPC) by different ratios of waste glass powder (5%, 10%, and 20% by weight of cement) on the performance of blended cement mortars. The hardened blended cement mortars were first cured under tap water for different time intervals 3, 7, 28, and 90 days. However, the effect of addition of 10% styrene‐acrylic ester as well as the influence of different doses of gamma rays on the physico‐chemical and mechanical properties of polymer modified blended cement mortar specimens were discussed. Compressive strength, total porosity, and water absorption percentages were measured. The experimental results showed that the physico‐chemical and mechanical properties of blended cement mortars specimens improved as the waste glass content increases up to 20%. In addition, irradiated SAE blended cement mortar composites containing 20% waste glass showed an enhancement in its properties as compared to neat cement (0%WG content) composites. The results were confirmed by X‐ray diffraction, thermogravimetric analysis, and scanning electron microscopy. POLYM. COMPOS., 39:985–996, 2018. © 2016 Society of Plastics Engineers

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Section: Methodssupporting

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Effect of waste glass content on the physico‐chemical and mechanical properties of styrene acrylic ester blended cement mortar composites

2016

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“…The effect of gamma rays as well as polyfunctional monomer on the properties of styrene‐butadiene rubber blend indicates that tensile strength, hardness, and gel content increase with increasing absorbed dose . Previous studies on polymer concrete impregnated or/and incorporated with styrene‐acrylic ester, unsaturated polyester contains 40% styrene monomer, polyvinyl chloride, and treated with gamma rays have been carried out showing an improvements in the physico‐mechanical properties . In the present study, different ratios of PUW are used as a partial replacement of white cement (WC) to produce lightweight white cement pastes (LWCPs).…”

Section: Introductionmentioning

confidence: 88%

Recycling of polyurethane foam waste in the production of lightweight cement pastes and its irradiated polymer impregnated composites

Abdel-Rahman

Younes

Khattab

2019

Vinyl Additive Technology

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This study aimed at using polyurethane foam waste in the production of lightweight white cement pastes by a partial replacement of white cement with different ratios of polyurethane foam waste (10%, 20%, 30%, and 40%) based on the weight of cement. The lightweight white cement pastes specimens in addition to conventional white cement paste were cured under tap water for 7 and 28 days. The physical, mechanical, and thermal properties were evaluated. The results showed that the specimens cured for 28 days achieved better properties as compared to the specimens cured for 7 days. Furthermore, at each curing age the specimens of lightweight white cement pastes showed relatively lower properties as compared to the conventional white cement paste and as the polyurethane waste content increased, the properties in terms of compressive strength and bulk density decreased while the total porosity percentage increased especially at higher ratios. On the other hand, the effects of styrene–butadiene rubber latex and irradiation dose on the properties of irradiated polymer impregnated lightweight white cement composites have been investigated. The results confirmed that the impregnation of the hardened lightweight white cement pastes with styrene–butadiene rubber latex and their exposure to different doses of gamma rays (50, 100, 150, and 200 kGy) showed a gradual improvement in the mechanical and physical properties up to 150 kGy and then started to decrease at 200 kGy. Characterization of some selected specimens was carried out by the studying of thermogravimetric analysis, scanning electron microscopy, and X‐ray diffraction. J. VINYL ADDIT. TECHNOL., 25:328–338, 2019. © 2019 Society of Plastics Engineers

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“…The blended cement mortar specimens were prepared by using SS with a ratio of (3:1 by mass); vigorous mixing of blended cement mortar components with water/cement (0.40) containing different percentages of SAE latex namely (2,4,6,8,10, and 15%) by weight of cement. After thorough mixing of the mixture, the resulting mortar was molded into cubic specimens by using cubic molds (each edge 2.5 cm in length), the fresh samples were cured in a humidity cabinet for 24 h at 25 C. The cubic samples demolded after 1 day, then subjected to various g-irradiation doses namely 10, 20, 30 and 50 kGy (dose rate 10 kGy/h) using cobalt-60 gamma cell-220 source (made in India); supplied from Symec Engineers (I) Pvt.…”

Section: Preparation Of Sae-ncc Cement Mortar Compositementioning

confidence: 99%

“…They are composed of a core made of the water‐insoluble polymer and a stabilization system used to avoid flocculation of the colloidal system . Presently, latexes of a single or combination of polymers like polyvinyl acetate, copolymers of vinyl acetate–ethylene, styrene–butadiene, styrene–acrylic, and acrylic and styrene–butadiene rubber emulsions are generally used to produce cement composite .…”

Section: Introductionmentioning

confidence: 99%

Thermal, mineralogical, and microstructural characterizations of irradiated polymer blended cement mortar composites

et al. 2014

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In this study, the effects of styrene–acrylic ester (SAE), nanocalcined clay (NCC), and irradiation dose on the thermal, mineralogical, and microstructural characterizations of irradiated polymer‐blended cement mortar composites have been investigated. The composites were prepared by partial replacement of cement with 5 and 10% NCC and mixed with sand, SAE latex was added with different ratios (2, 4, 6, 8, 10, and 15%); the composites were subjected to various doses of γ‐irradiation ranged from 10 to 50 kGy. Physicomechanical properties, thermogravimetric analysis, X‐ray diffractometry, and scanning electron microscopy techniques were carried out. Mechanical investigation manifested that composites loaded with SAE up to 8% showed the best mechanical performance as compared with composites contains 10 and 15% SAE. POLYM. COMPOS., 36:1849–1858, 2015. © 2014 Society of Plastics Engineers

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Studies on γ-irradiated polymer–nano calcined clay blended cement mortar composites

Cited by 20 publications

References 25 publications

Effect of waste glass content on the physico‐chemical and mechanical properties of styrene acrylic ester blended cement mortar composites

Effect of waste glass content on the physico‐chemical and mechanical properties of styrene acrylic ester blended cement mortar composites

Recycling of polyurethane foam waste in the production of lightweight cement pastes and its irradiated polymer impregnated composites

Thermal, mineralogical, and microstructural characterizations of irradiated polymer blended cement mortar composites

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