Concrete/Cement Admixture-aliphatic Series Water Reducing Agent

Use of Water Reducers, Retarders, and Superplasticizer

Use of Water Reducers, Retarders, and Superplasticizers. Introduction. Many important characteristics of concrete are influenced by the ratio (by weight) of water to cementitious materials (w/cm) used in the mixture. By reducing the amount of water, the cement paste will have higher density, which results in higher paste quality.

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Water Reducers, Mid-Range - North America

Water Reducers, Mid-Range Provide excellent concrete workability and finishability. Mid-range water-reducing admixtures promote superior workability and finishing of concrete, and improve concrete performance with excellent early strength and rheology. Non-chloride admixtures; Facilitates finishing to achieve desired surface appearance

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Seven Must-Use Concrete Admixtures (Additives)

What is "water reducing" admixtures?

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concrete water reducing agent - Anhui Elite Industrial Co ...

China concrete water reducing agent catalog of Naphthalene Superplasticizer Water Reducing Agent for Concrete Admixture, Concrete Retarder of 98% Sodium Gluconate provided by China manufacturer - Anhui Elite Industrial Co., Ltd., page1.

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Materials Selection Guide: Water-Reducing Admixtures ...

Dec 05, 2006 · Decreasing the water content reduces the water-cement ratio, thereby increasing the resulting concrete's strength. These admixtures can be broken into three main categories. Conventional water-reducing admixtures—also known as low-range water reducers—represent the first generation of water-reducing admixtures that have been around for more ...

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Revealing the Mystery of Admixtures: Water-Reducing and Set ...

May 29, 2010 · Water-Reducing Admixtures Water reducers do essentially that: reduce the amount of mixing water required to obtain a given slump. This can result in a reduction of the water-cementitious ratio (w/c ratio), which leads to increased strengths and more durable concrete.

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Superplasticizer I Concrete admixtures I Super plasticizer

By reducing the amount of water. The cement paste will have higher density, which result in higher paste quality. An increase in paste quality will yield higher compressive and flexural strength, lower permeability, increase resistance to weathering, improve the bond of concrete and reinforcement, reduce the volume change from drying and ...

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Effects of Shrinkage Reducing Agent and Expansive Admixture ...

This paper investigated the influences of shrinkage reducing agent and expansive admixture on autogenous and drying shrinkage of ultrahigh performance concrete (UHPC) containing antifoaming admixture. The shrinkage reducing agent was used at dosage of 0.5%, 1%, and 2% and the expansive admixture was used at dosage of 2% to 4% by mass of cementitious material. The results show that the air content of UHPC increases with the higher addition of shrinkage reducing agent and expansive admixtures. How

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Performance of Different Water Reducing Chemical Admixtures

The variables include cement types (ordinary portland cement, blended cement replaced by slag powder of 4080 and 7900 cm2/g), air-entraining (vinsol) chemical admixture, water-reducing (lignosulfonate type) chemical admixture, high-range water-reducing and air-entraining (naphthalene, melamine, polycarboxyl, and amion-sulfonate types) chemical ...

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A Closer Look: Water-Reducing Admixtures - NPCA

Water-reducing admixtures have a similar backstory – researchers stumbled upon an admixture’s impact on water demand while trying to evenly disperse pigment in concrete. In 1930, Cabot Corporation had promised to create a black concrete for a local state road, but trial batches yielded a blotchy result.

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Waterproofing Admixtures For Concrete| Concrete Construction ...

Aug 13, 2012 · Table 1, reproduced from ACI 212.3, summarizes results from a series of permeability tests performed on concrete mixes with and without three different types of PRAs. Note that these results only indicate the reduction in permeability between the reference and test concrete for each admix type.

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Concrete admixture | GCP Applied Technologies

Mid-range water reducers – These admixtures provide superior placeability and finishing for concrete flatwork, in commercial and high-end residential construciton. They are manufactured under rigorous quality control to ensure uniform, predictable performance.

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Application of Water Reducing Agent in Concrete of ...

Tests of cement paste and concrete of Portland cement (P∙O42.5) were carried out under different temperature, because this kind of cement is widely used in the current projects. Results show that polycarboxylic series water reducer, compared with naphthalene series water reducer, have properties of high compatibility, low mixing amount, high ...

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Durability of Latex Modified Concrete Mixed with a Shrinkage ...

reducing agent could reduce the surface tension of capillary water to 30 * 45 mN/m, decreasing drying shrinkage (Kim et al. 1997). 3. Experiment Plan and Method 3.1 Test Variables In order to evaluate the properties of the LMC mixed with the shrinkage reducing agent, the mixing ratio of the shrinkage reducing agent used in ordinary concrete was ...

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Science and Technology of Concrete Admixtures | ScienceDirect

The use of shrinkage-reducing admixtures is a simple and efficient way to fight early cracking of concrete with a water–cement ratio (w/c) or water–binder ratio (w/b) less than 0.40 due to the early development of autogenous shrinkage, as well as the long-term cracking of concretes with w/b or w/c greater than 0.40 that are subjected to ...

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Chemical Admixtures - cement.org

Water-reducing admixtures usually reduce the required water content for a concrete mixture by about 5 to 10 percent. Consequently, concrete containing a water-reducing admixture needs less water to reach a required slump than untreated concrete. The treated concrete can have a lower water-cement ratio.

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Chemical Admixtues.ppt | Concrete | Cement

Applications water-reducing admixtures BENEFITS ACHIEVED BY USING WATER-REDUCING ADMIXTURES. Test series. cement content (kg/m3) W/C. Slump (mm) Compressive strength (Mpa) 7 days. 28 days. A Reference. concrete (no admixture) 300. 0.62. 50. 25. 37. A given dosage of a water-reducing admixture is added with the purpose of: B. Consistency ...

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Water Reducers, Normal - North America

Water-reducing admixtures reduce water usage and influence concrete setting characteristics to desired levels. Water-reducing admixtures can be used to increase slump and workability of concrete without adding water, or to reduce water content of concrete.

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PAPER OPEN ACCESS Development of Concrete Admixtures and ...

and the water reducing effect is also different.It can be seen from Table 4 that the same ordinary water reducing agent can obtain better water reducing effect than the same mixing method. Table 4. Effect of ordinary water reducing agent incorporation on concrete workability and water reduction rate

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YL-08NP-复配外加剂 - FAR EAST YU LA INDUSTRY LIMITED

YL - 08 np retarded high efficiency water reducing agent. Products overview: YL - 8 retarded efficiency water reducing agent, naphthalene series high efficient water reducing and a moderate amount of retarder, stabilizer, and increasing agent compounded components, with high efficiency water reducing, retarded the early and final set late early strength, enhancement, and the characteristics of ...

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How Extra Water Affects Concrete Quality - Cemen Tech

Jul 22, 2019 · The most recognized factor in this formula is the water/cement ratio — the pounds of water to the pounds of cement in concrete. When water meets cement, the hydration process begins. This chemical reaction, and the amount of water used relating to cement, is what causes the sand and stone to hold or stay bonded together.

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US4046583A - Method of producing expansive and high strength ...

Expansive and high strength cementitious pastes, mortars and concretes are produced by adding to a mix of water, cement and aggregates a mixture containing calcium oxide and/or magnesium oxide, a water-reducing agent and an additive for reducing or eliminating bleeding of the fresh mix.

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(PDF) Experimental Study of Mechanical Properties of M30 ...

The machanical properties M30 grade hybrid concrete was prepared by using GGBS in replacement with cement ratio of 5 %, 10 %, 15 %, 20 % and steel fiber in ratio of 0.5%,1% and 1.5%.

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Effect of W/C Ratio on Durability and Porosity in Cement ...

Water is often added to concrete placing for easy workability and finishability in construction site. The additional mixing water can help easy mixing and workability but causes increased porosity, which yields degradation of durability and structural performances. In this paper, cement mortar samples with 0.45 of W/C (water to cement) ratio are prepared for control case and durability ...

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Building Science Division 3 Flashcards | Quizlet

The ____ test is used to determine the water and cement content of fresh concrete. ... water-reducing agents. ... through a series of freeze-thaw cycles.

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