our products

D&Q Mining is a high-tech company integrating R&D, production and sales. It provides mature products and solutions such as crushers, sand making, milling equipment, mobile crushing stations, etc., for aggregate, mining and waste recycling.

citric acid concrete admixtures

Using Citric Acid As An Admixture and It's Influence on

of 13% relative to reference concrete mix. So, citric acid can be classified according to ASTM-C494 as water-reducing and retarding chemical admixture type D. The investigation also extends to evaluate the effect of using citric acid on properties of concrete such as, compressive strength, splitting tensile strength, modulus

More

(PDF) Using Citric Acid As An Admixture and It's

So, citric acid can be classifie d according to ASTM-C494 as water-reducin g and retarding chemical admixture type D. The investigatio n also extends to evaluate the effect of using citric acid on...

More

Citric Acid as Admixature in Concrete

Citric Acid as Admixature in Concrete manufacturing by Shenyang East Chemical Science-Tech Co., Ltd.; Product details of China Citric Acid as Admixature in Concrete. Communicate with

More

Other Admixature Citric Acid Used in Concrete

Other Admixature Citric Acid Used in Concrete manufacturing by Shenyang East Chemical Science-Tech Co., Ltd.; Product details of China Other Admixature Citric Acid Used in Concrete.

More

Citric acid MIKEM CHEMICAL

Concrete Admixtures. Naphthalene based superplasticizer (Powder) Polypropylene Fiber (Mesh) Plastic-Steel Fiber; Polypropylene Fiber (Monofilament) Steel Fiber; Polycarboxylate Superplasticizer (Liquid) Sodium Gluconate; Coating Auxiliaries. Hydroxyethyl cellulose (HEC) Preservative in Paints and Coatings; Iron Oxide Pigments; Organic Bentonite

More

Admixtures of Concrete Ultimate Guide

Admixture (ASTM C125): “An admixture for concrete is defined as a material other than water, hydraulic cement, and aggregates that used as an ingredient of concrete and is added to the batch immediately before or during mixing”

More

Influence of Citric Acid on the Hydration of Portland

02/12/2020 Carboxylic acids are used as retarding admixtures and can be found in the compositions of flow modifiers. C Citric and tartaric acids are known to

More

Admixture Interactions in Concrete ScienceDirect

01/01/1996 Hydroxycarboxylic acids such as citric acid, tartaric acid, salicylic acid, heptonic acid, saccharic acid and gluconic acid-based admixtures contain (OH) and (COOH) groups. Gluconic acid-based admixtures are used extensively. Carbohydrates include glucose, sucrose or hydroxylated polymers obtained by partial hydrolysis of saccharides. The role of water reducers (normal,

More

Admixtures of Concrete Ultimate Guide

Hydroxycarboxylic acids such as citric acid, tartaric acid, salicylic acid, heptonic acid, saccharic acid and gluconic acidbased admixtures contain (OH) and (COOH) groups. Gluconic acid-based admixtures are used extensively. Carbohydrates include glucose, sucrose or hydroxylated polymers obtained by partial hydrolysis of saccharides; Action on concrete

More

Admixtures for Concrete Countertops

admixtures • Uses citric acid as a set retarder Heat • Temperature of curing concrete affects strength gain Concrete strength gain is about twice as fast at 90°F (32 °C) than it is at 70 °F (21 °C) Heat • Hot water Warms mix ingredients Decreases setting time Increases initial hydration rate • Warm curing environment (80 °F-100 °F / 27 °C-38 °C) Maintains

More

Citrc Acid Sodium Naphthalene Sulfonate;

Shandong Wanshan Chemical Co., Ltd is one of the subsidiary factory of Shandong Wanshan Group. Our Group business include : Concrete admixture Sodium Naphthalene Sulfonate Formaldehyde (SNF/PNS/FDN); Sodium Gluconate; Food additive such as Citric Acidl Agriculture fertilizer; Coal Chemical Industry and so on. Products Categories.

More

Effect of Citric Acid on Cement Hydration

The results show that: citric acid can effectively increase the initial cement fluidity, when the content is exceed to 0.1%, the 60 min flow loss of increased gradually. Citric acid retarding effect increases with dosage, but there is a critical dosage, when the dosage is less than 0.1%, the initial setting time and final setting time increased slowly; When the dosage more than 0.1%, the initial setting time increased

More

Chemical Admixtures The Concrete Portal

A chemical admixture is any chemical additive to the concrete mixture that enhances the properties of concrete in the fresh or hardened state. It does not typically include paints and protective coatings (for steel or concrete). ACI 116R defines the term admixture as “a material other than water, aggregates, hydraulic cement, and fiber reinforcement, used as an ingredient of concrete or mortar, and added to

More

Effect of Citrate Salts of Li+, Na+ and K+ on Some

concrete workable during the entire placing and consolidation period [5]. In the literature, various water-reducers\ retarders admixtures were found such as sugars [6,7], cellulose ethers [8,9], lignosulfonic acid [10,11], citric acid [12-15], gluconates [16], dextrins [17], and calcium sulfate [18].

More

Effect of chemical admixtures on setting time,

This study analyzed the effect on setting time of three retarders, namely Protein Salt (PS), Citric Acid (CA), and Sodium Tripolyphosphate (STPP). The fluidity of GSL was investigated individually using three different types of superplasticizer, namely naphthalene (FDN), polycarboxylate (PCE) and melamine (MSF). Finally, the effect of these chemical admixtures on mechanical properties of GSL hardened

More

Resistance of Mineral Admixture Concrete to Acid Attack

nitric acid and sulfuric acid are most dangerous for con-crete. Sulfuric acid is highly corrosive due to the fact that apart from the dissolution caused by hydrogen ions, sulfate ions tend to initiate sulfate attack (Hewayde et al. 2007; Attiogbe and Rizkalla 1988; Ichitsubo et al. 2006; Kawai et al. 2005). Sulfuric acid is found in concrete

More

Shrinkage-Compensating Concrete—Past, Present, and Future

Concrete Mix Designs PCC with Shrinkage Reducing Admixtures Materials (per cubic yard) SRA#1 SRA#2 PCC HPC CTS Shrinkage Compensating Rapid Set #1 #2 Komp I - - 120 120 PC 356 355 355 543 370 370 Flyash 88 88 88 180 - Rapid Set Cement - - - 658 Citric Acid - - - 5 Course Aggregate 57 1850 1850 1850 1850 1750 1750 1772

More

SINTEF REPORT

Retarding admixtures for concrete State of the art AUTHOR(S) Roar Myrdal CLIENT(S) SINTEF Building and Infrastructure COIN Concrete Innovation Centre Address: NO-7465 Trondheim NORWAY Location: Richard Birkelands vei 3 Telephone: +47 73 59 52 24 Fax: +47 73 59 71 36 Enterprise No.: NO 948 007 029 MVA

More

Admixtures for Concrete Countertops

admixtures • Uses citric acid as a set retarder Heat • Temperature of curing concrete affects strength gain Concrete strength gain is about twice as fast at 90°F (32 °C) than it is at 70 °F (21 °C) Heat • Hot water Warms mix ingredients Decreases setting time Increases initial hydration rate

More

Influence of set retarding admixtures on calcium

01/02/2018 Anhydrous ACS grade citric acid (Electron Microscopy, 99.5% purity), with dosage rates as a proportion of the unhydrated cement content, were used for all retarded samples. Citric acid is considered an ASTM C494 Type B retarding admixture for portland cement. Table 1.

More

The chemistry of hydration of high alumina cement

01/01/1984 Citric acid is used commercially as a retarder for HAC and Young (5) has sugg- ested that some hydroxycarboxylic acids have the advantageous effect of stabil- ising the hexagonal calcium aluminate hydrates with respect to conversion to the cubic hydrate. Lithium carbonate has been found to be a very effective accelerator for HAC, the degree of acceleration increasing with the amount of the salt added to the gauging water (6). In chemical terms, the mode of action of these admixtures

More

Concrete Admixtures MIKEM CHEMICAL

MIKEM offers a wide range of concrete additives with innovative options to help our customers meet the challenges of the modern construction business. Our concrete admixtures are used to perform diverse functions such as plasticizing, air-entertaining, rheology modifying, accelerating, retarding, shrinkage reducing, and corrosion-inhibiting.

More

MIKEM Concrete Admixture and Construction

Concrete admixtures is one of our strong product. Builders and construction engineers add concrete admixtures to a cement mixture. The effect of a concrete admixture is to give the cement mixture a better finish, increase the durability of the cement mixture, and reduce water content, amongst others. Evidence of how concrete admixtures are important is that they take the lion’s share of the construction chemical market around 65%. At MIKEM, we aim to create concrete admixtures

More

(PDF) Accelerating admixtures for concrete

Accelerating admixtures affect the rates of reactions between cement and water to give an overall increase in the hydration rate. Thus, the use of accelerators in concrete provides a shortening of

More

Resistance of Mineral Admixture Concrete to Acid Attack

nitric acid and sulfuric acid are most dangerous for con-crete. Sulfuric acid is highly corrosive due to the fact that apart from the dissolution caused by hydrogen ions, sulfate ions tend to initiate sulfate attack (Hewayde et al. 2007; Attiogbe and Rizkalla 1988; Ichitsubo et al. 2006; Kawai et al. 2005). Sulfuric acid is found in concrete

More

Chemical Admixtures The Concrete Portal

A chemical admixture is any chemical additive to the concrete mixture that enhances the properties of concrete in the fresh or hardened state. It does not typically include paints and protective coatings (for steel or concrete). ACI 116R defines the term admixture as “a material other than water, aggregates, hydraulic cement, and fiber reinforcement, used as an ingredient of concrete or mortar, and added to

More

Admixtures for Concrete Memphis

Admixtures for Concrete Fig. 6-1. Liquid admixtures, from left to right: antiwashout admixture, shrinkage reducer, water reducer, foaming agent, corrosion inhibitor, and air-entraining admixture. (69795) Despite these considerations, it should be borne

More

MIKEM CHEMICAL Green Chemistry, Better Living

Concrete Admixtures. Naphthalene based superplasticizer (Powder) Polypropylene Fiber (Mesh) Plastic-Steel Fiber; Polypropylene Fiber (Monofilament) Steel Fiber; Polycarboxylate Superplasticizer (Liquid) Sodium Gluconate; Coating Auxiliaries. Hydroxyethyl cellulose (HEC) Preservative in Paints and Coatings; Iron Oxide Pigments; Organic Bentonite

More