In this work, the influence of adding modified montmorillonite nanoclay (NC) particles, which are nanoparticles of layered mineral silicates, on Class G cement strength retrogression resistance under the hightemperature condition of 300°C was evaluated.
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Influence of elevated temperatures on physical and compressive strength properties of concrete containing palm oil fuel ash Construction and Building Materials, 2011 Mohammad Ismail
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Thermal effects on materials 5 Classification by stage in the manufacturing of materials • During materials production • Melting temperature of ores, and the influence of fusers • Solidification of melts, and the influence of the cooling rate • Phase diagrams (most alloys are prepared by melting together and mixing the components).
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Many measures including casingsand adhesion have been developed to improve cementing bond strength. However, due to the lack of detailed study of the technique, many questions remain. The primary goal of this study is to investigate the influence of casingsand adhesion on cementing bond strength, and to optimize parameters.
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Properties of Normal Concrete. Its slump varies from 1 4 inches. Density ranges from 140 pcf to 175 pcf. It is strong in compression and weak in tension. Air content 1 2 %. Normal concrete is not durable against severe conditions freezing and thawing. High strength concrete.
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In terms of workability, the workability of the concrete decreased as the temperature of the mixingwater increased, getting to a high of 87 mm slump at 550C and. The study has revealed that water temperature has a significant influence on the strengthand workability.
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The influence of silica modulus (Ms) on the compressive strength of alkali activated ultrafine palm oil fuel ash based mortar has been investigated. Two alkali activated mortar mixtures, S 1 and S 2 were prepared using sodium silicate (Na 2 SiO 3 ) with initial silica moduli, Ms of and 2, respectively.
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compressive strength) of mortar containing mineral oil. The fresh properties (flow, wet density and air content) have been tested to identify if they have any effect on the resulting strength. 1PhD Student, School of Civil and Environmental Engineering, Faculty of Engineering, University of .
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The effects of direct quenching and tempering (DQT) process and conventional reheat quenching and tempering (RQT) processes on mechanical properties and microstructure of high strength steel were investigated. The DQ process was found to enhance the hardenability of steel effectively.
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Each type of soil has different properties which can affect the way a home's foundation is supported. Knowing what kinds of soils these are and which one your house sits atop may allow you to catch problems in your foundation even before they arise. Clay: Clay is an expansive soil, which means it expands when wet and shrinks when dry. When clay is moist, it's easily moved, manipulated, and shifted.
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Permeability of concrete is defined as the property that controls the rate of flow of fluids into a porous solid. It largely depends on the size of pores, connectivity of pores, and how tortuous the path is for the permeating fluid. The pores relevant to permeability are those with a minimum ...
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Concretefilled GFRP tubes (CFFTs) with and without moment connections to concrete footings were tested. The study aims at exploring the combined effect of maxi
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Concrete is prone to many types of dirt and stains. Mostly, concrete gets soiled from dirt, algae, mold, mildew and other environmental elements. Concrete driveways suffer from oilbased stains and more stubborn problems. Clorox bleach can be used as a preparatory cleaner on some stains, and can remove dirt and kill algae on other areas.
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Laboratory Studies on the Influence of Crude Oil Spillage on Lateritic SoilShear Strength: A Case Study of Niger Delta Area of Nigeria Oluwatobi Brian Oyegbile1 2and Gbenga Matthew Ayininuola Abstract Short term laboratory studies on the influence of crude oil spillage on lateritic soil shear strength were performed for a period of six months.
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Taking the size effect into account is essential for safe prediction of strength of large concrete bridges, nuclear containments, roof shells, tall buildings, tunnel linings, large loadbearing parts of aircraft, spacecraft and ships made of fiberpolymer composites, wind turbines, large geotechnical excavations, earth and rock slopes, floating sea ice carrying loads, oil platforms under ice forces, etc.
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Jan 01, 2016· The influence of nanolimestone / nano CaCo 3 (NC) on the properties of ultrahighperformance concrete (UHPC) cured at standard and heat conditions was experimentally investigated. The NC was used at ratios of 1, 2, and 3% as partial mass replacement for cement.
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Jan 01, 2016· The influence of nanolimestone / nano CaCo 3 (NC) on the properties of ultrahighperformance concrete (UHPC) cured at standard and heat conditions was experimentally investigated. The NC was used at ratios of 1, 2, and 3% as partial mass replacement for cement. Incorporating NC accelerated the hydration reactions of UHPC because of the nucleation effect.
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Sep 13, 2019· Concrete is a permeable substance capable of absorbing and releasing moisture, which can continue to affect the RH of a slab long after it's been placed. Sources of .
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Influence of different types of polypropylene fibre on the mechanical properties of highstrength oil palm shell lightweight concrete. Author links open overlay panel Ming Kun Yew a Hilmi Bin Mahmud a Bee Chin Ang b Ming Chian Yew c. Show more.
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This artic e outlines the chemistry of port land cement, the variety used to cement casings in wells and provide zona isolation, and explains how additives faci itate cement placement and ensure stability after Rudimentary cementing of oil wells began at the turn of the century when few wel s went deeper than 2,000 feet [610 meters].
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Dec 06, 2004· This paper presents use of improved palm oil fuel ash (POFA) as a pozzolanic material in producing highstrength concrete. The POFA was ground by ball mill until the median particle size was reduced to about 10 μ m. It was used to replace portland cement, ASTM Type I, by 10, 20, and 30% by weight of cementitious materials to make highstrength concrete.
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micropores that concrete develops due to cement hydration, reacting with concrete constituents to weaken the structure. Addition of magnetic nickel nanoparticles during concrete formation increases the compressive strength by over 15% as the magnetic interaction enhances the mechanical properties of .
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Disinfectant. Bleach not mixed with a detergent serves as a disinfectant to sanitize concrete surfaces. Detergents and organic material render bleach ineffective as a disinfectant, according to a report by Cornell University College of Veterinarian Medicine. Therefore, they recommend cleaning the concrete surface with a detergent,...
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Zeyad, "Influence of Steam Curing on Engineering and Fluid Transport Properties of High Strength Green Concrete Containing Palm Oil Fuel Ash", PhD thesis, Universiti Sains Malaysia: Penang, Malaysia, .
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the effect of sabkhas on compressive strength. Concrete cyl inders 75 mm in diameter and 150 mm in height, with a cen trally embedded 12 mm reinforcing bar were used to inves tigate reinforcement corrosion. The steel bar was coated with an epoxy paint at the concreteair interface and at it end, which wa embedded in concrete.
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