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Influence of Surface Scaling on the Performance of Cement

Influence of Surface Scaling on the Performance of Cement

Influence of Surface Scaling on the Performance of Cement ...

2021-8-5  Causes of Scaling of Concrete Pavement Surface The major causes of scaling of concrete pavement slabs include; Poor quality concrete mix (which may be due to high water to cement ratio over 0.5, excessive slump for prevailing job, premature finishing i.e. finishing operation carried out while bleed water is present, too much fines in fine aggregate, dusty aggregate, inadequate curing etc.).

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Effects of surface states on salt-frost scaling resistance ...

2019-12-1  The influence of different plastering methods on salt-frost resistance of the concrete shows an obvious law in the whole test process. As shown in Fig. 2, under the condition of only vibration, the scaled mass is the largest for the unplastered concrete with bleeding in the group A, while it is the smallest for unplastered concrete without bleeding in the group B.

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REPAIR OF SCALED SURFACE AREAS OF NEWLY CONSTRUCTED CEMENT ...

Influence of surface scaling on the performance of cement concrete roads, New Building Materials Construction World, March 2018. Distress Identification manual for the

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INFLUENCE OF PRE-WETTED LIGHTWEIGHT AGGREGATE

2009-1-8  the structure of concrete surface layers is more dense, reducing the water evaporation and the diffusion process becomes slower. The surface of concrete with lightweight aggregate will be denser than of traditional high performance concretes [6], and therefore more resistant to scaling. Laboratory tests

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Repair of Scaled Surface Areas of Newly Constructed Cement ...

2021-7-14  Influence of surface scaling on the performance of cement concrete roads, New Building Materials Construction World, March 2018. Miller, J.S., and Bellinger, W.Y. 2003. Distress Identification manual for the long-term pavement performance program (4th revised Ed.), FHWA-RD-03-031, Washington, D.C.

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Prevent Scaling - Portland Cement Association

Scaling is defined as a general loss of surface mortar or mortar surrounding the coarse aggregate particles on a concrete surface. This problem is typically caused by the expansion of water due to freezing and thawing cycles and the use of deicing chemicals; however, properly specified, produced, finished, and cured quality concrete need not ...

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The influence of filler type and surface area on the ...

2015-10-15  The w/s, specific surface area of the CAC and the fillers (SSA cement and SSA filler) and CAC replacement level (r, %) are used as inputs. The cumulative heat evolved by the reaction of the CAC is computed using a scaling parameter, A (kJ/mole), as shown in Eq.

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Effect of curing regimes on hardened performance of ...

2019-6-30  The effects of different water-to-cementitious material (w/cm) ratio, slag-cement, and air content on the salt-scaling resistance of concrete mixtures were thoroughly studied by Amini et. al , .According to their results, regardless of the air and slag-cement content, mixtures made with w/cm of 0.35 and 0.55 exhibited considerably high and low resistance to salt-scaling damage, respectively.

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Influence of coarse aggregate angularity on the mechanical ...

2019-4-20  The influence of the aggregate morphology on the mechanical performance, particularly on the strengths, of CBM has been broadly investigated. The use of flat and elongated particles in concrete has been evidenced negatively to impact the strengths , , , which led to the development of guidelines and specifications that define the requirement of aggregates in terms of the (i) global form ...

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Cement and Concrete Research Journal ScienceDirect ...

Cement is a vital component of concrete, the most used human-made material on the planet. Roughly half of all products manufactured every year are comprised of cementitious materials. It is crucial and exciting to have an open access journal detailing the most innovative findings View full aims scope

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INFLUENCE OF PRE-WETTED LIGHTWEIGHT AGGREGATE ON SCALING ...

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The subject of the presented investigations was influence of pre-wetted lightweight aggregate on damage of the concrete surface due to cyclic freezing and thawing in the presence of de-icing salts tested according to the Swedish Standard SS 13 72 44 (the Borås method).

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Prevent Scaling - Portland Cement Association

Scaling is defined as a general loss of surface mortar or mortar surrounding the coarse aggregate particles on a concrete surface. This problem is typically caused by the expansion of water due to freezing and thawing cycles and the use of deicing chemicals; however, properly specified, produced, finished, and cured quality concrete

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Effects of Aggregate Size, Shape, and Surface Texture on ...

10 percent or more by weight of asphalt cement, whereas 5 percent by weight might be quite suitable for a dense-graded asphaltic concrete of 1 in. maximum size. Vallerga (14) believes that "Brittleness (or inflexibility) of asphaltic pavingmixtures is a function of asphalt content, aggregate grading, and, in particular, the final condi-

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Effect of entrained air voids on salt scaling resistance ...

2013-12-27  Salt scaling is a major damage problem for concrete pavements in cold environments. Salt scaling is a type of superficial damage caused by freezing and thawing a saline solution on the surface of concrete. Effects of a new composite Portland cement and air void on deicer scaling resistance of concrete were investigated in this paper. Another objective is to investigate effects of compressive ...

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Energies Free Full-Text Influence of Slag Cement on ...

Durability of concrete designed for radiation shielding structures is an important issue in nuclear power plant safety. An investigation of the permeability of concrete containing heavyweight aggregates and water-bearing aggregates was performed with respect to gaseous and liquid media. Mix design was developed using Portland and slag cement, crushed magnetite and serpentine aggregate.

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Frost Scaling Resistance and Improvement of Concrete ...

In order to increase freeze-salt scaling resistance of concrete, improvement of fly ash, slag and air entraining agent on freeze-salt scaling resistance are researched according to the CDF method. The results show that the scaled mass and the dynamic modulus of elasticity loss rate of concrete are reduced by 20% to 36 % and 4 % to 55 %. The microstructure was more denser compared with the ...

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INFLUENCE OF BLENDED CEMENT WITH HCFA ON

2020-7-17  INFLUENCE OF BLENDED CEMENT WITH HCFA ON MICROSTRUCTURE AND CHLORIDE IONS TRANSPORT OF CONCRETE RESISTANT TO SURFACE SCALING Mariusz DĄBROWSKI1, Karolina GIBAS, Michał A. GLINICKI Institute of Fundamental Technological Research Polish Academy of Sciences 5B, Pawińskiego Str., 02-106 Warszawa, Poland, 1e-mail:

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A Study of the Influence of Surface Roughness on Heat

2011-3-1  The experiment was conducted in order to test how surface roughness affects the rate temperature rises in aluminum. 1.2 Rationale The effects of surface texture on heat transfer are not yet known. The reason for this experiment is to provide initial observations on the effects that increasing surface textures have on the amount of heat transferred.

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Analysis on the Strength of Cement Mortar Mixed with ...

2021-1-9  It can be seen that the brick powder has similar chemical compositions as the cement. However, compared with cement, the brick powder has much lower content of CaO, while its SiO 2 and Al 2 O 3 fractions are higher. The main chemical components of the cement and brick powder are CaO and SiO 2, respectively.They have approximately the same amount of Na 2 O. . From Figure 1, it is clear

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What are the Factors Affecting Workability of Concrete?

Water/cement ratio is one of the most important factor which influence the concrete workability. Generally, a water cement ratio of 0.45 to 0.6 is used for good workable concrete without the use of any admixture. Higher the water/cement ratio, higher will be the water content per volume of concrete and concrete

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Breaking the Cycle of Surface Scaling on Concrete Flatwork

2020-1-28  1. Understand the causes of surface scaling on concrete formwork. 2. Identify factors leading to the recent onset of scaling issues, including weather, construction practices, materials, competition, pricing, specifications, expectations, and supervision. 3. Recognize common strategies for avoiding concrete surface scaling. 4.

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Properties of concrete with Ground Granulated Blast ...

performance of concrete mixes produced with GGBS in the ... concrete called surface scaling. In this type of frost attack, ... The influence of the air entrainment and curing temperature on the properties of the hardened GGBS concrete has also been investigated.

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Concrete performance using BFS cement - Article on the ...

2006-11-1  Concrete performance using BFS cement. Figure 1: The principle of the equipment used for penetration tests. Figure 2: Selection of superplasticizer depends on the change of the flow point. Figure 3: Spread depends on the time and the kind of blastfurnace cement. Figure 4: Optimisation of superplasticiser and silica fume ratio.

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Energies Free Full-Text Influence of Slag Cement on ...

Durability of concrete designed for radiation shielding structures is an important issue in nuclear power plant safety. An investigation of the permeability of concrete containing heavyweight aggregates and water-bearing aggregates was performed with respect to gaseous and liquid media. Mix design was developed using Portland and slag cement, crushed magnetite and serpentine aggregate.

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Effect of curing regimes on hardened performance of ...

Abstract This paper is focused on evaluating the impact of curing on concrete performance, and correlating hardened performance to salt-scaling resistance of concrete. The performance of the mixtures was determined through air-void system, sorptivity, and abrasion tests. A total of seven different curing regimes were applied to mixtures made with different binary systems containing 0%, 20%, 40 ...

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What are the Factors Affecting Workability of Concrete?

Water/cement ratio is one of the most important factor which influence the concrete workability. Generally, a water cement ratio of 0.45 to 0.6 is used for good workable concrete without the use of any admixture. Higher the water/cement ratio, higher will be the water content per volume of concrete and concrete

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Pavements and Surface Materials - CT NEMO Program

2019-1-15  Concrete surface maintenance costs are very low. The thickness of the wearing surface and gravel base of concrete sidewalks varies based on intended use. Common concrete sidewalk wearing surfaces range from 4" to 6" with gravel bases ranging from 4" to 8." Concrete is also used to make precast paver stones of various

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Scaling Effect on Electromagnetic Performance of Surface ...

2020-3-12  Abstract: This article investigates the impact of scaling on the electromagnetic performance of surface-mounted permanent-magnet Vernier (SPM-V) machines with a main focus on open-circuit induced Electro Motive Force (EMF). Three different power ratings, i.e., 3 kW, 500 kW, and 3 MW, have been chosen for this article. For each power rating, the SPM-V machines are analyzed for different slot ...

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The Effect of Aggregate Properties on Concrete

2000-3-30  The Effect of Aggregate Properties on Concrete Concrete is a mixture of cementious material, aggregate, and water. Aggregate is commonly considered inert filler, which accounts for 60 to 80 percent of the volume and 70 to 85 percent of the weight of concrete.

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Influence of Acrylic Emulsion on Polymer-Cement Waterproof ...

In this study, effects of polymer-cement (P/C) ratio, glass transition temperature (Tg); amounts of functional monomers (acrylic acid, hydroxypropyl methacrylate, ammonium polyacrylate, diacetone acrylamide) on properties of polymer cement mortar were investigated. According of the tensile test, breaking elongation (ε) and the tensile strength (δ) of polymer latex-cement composites with low ...

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