effects of admixtures on the properties of cca cement

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Effects of Admixtures on the Properties of CCA Cement Concrete

The study investigated the effects of admixtures on the properties of corn cob ash (CCA) cement concrete. The workability and compressive strength of CCA cement concrete incorporated with accelerator, plasticizer and water reducing and retarding were carried out. The dosage of admixture

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Effects of Admixtures on the Properties of Corn Cob Ash ...

The study investigated the effects of admixtures on the properties of corn cob ash (CCA) cement concrete. The workability and compressive strength of CCA cement concrete incorporated with accelerator, plasticizer and water reducing and retarding were carried out.

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(PDF) Effects of Admixtures on the Properties of Corn Cob ...

The study investigated the effects of admixtures on the properties of corn cob ash (CCA) cement concrete. The workability and compressive strength of CCA cement concrete incorporated with ...

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Effects of Admixtures on the Properties of Corn Cob Ash ...

The study investigated the effects of admixtures on the properties of corn cob ash (CCA) cement concrete. The workability and compressive strength of CCA cement concrete incorporated with accelerator, plasticizer and water reducing and retarding were carried out. The dosage of admixture incorporated was: 0.124litre per 15.55kg of cementitious material based on the recommendation by

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On the Properties of Concrete composites with Corn admixtures

The study investigated the effects of admixtures on the properties of corn cob ash (CCA) cement concrete. The workability and compressive strength of CCA cement concrete incorporated with ...

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Effect of Accelerating Admixture on Properties of Concrete

Effect of Accelerating Admixture on Properties of Concrete International organization of Scientific Research 50 P a g e increase in compressive strength was observed at 28 days with respect to reference mix. Compressive strength for concrete mix with 3% sodium nitrite by weight of cement was found to be less than that of reference mix. 1.2.2.

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Effects of Chemical Admixtures in Concrete and Mortar

on limitations of concrete shrinkage, the effect of chemi­ cal admixtures on concrete durability, and the control of the uniformity of these admixtures. In the area of shrinkage control, ASTM C494-63T, Chemical Admixtures for Concrete, required that admix­ ture concrete be limited to a shrinkage of 100 micro­ inches per inch over that of a ...

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Effect of admixtures on properties of alkali-activated ...

Sep 01, 2000  5.6. Fig. 3 shows the effect of admixtures at dosages of 6–10 ml/kg slag (mix proportions in Table 2) on compressive strength of AAS concrete for up to 28 days. Superplasticiser caused 25% loss of 28 day strength, and use of water reducing admixture resulted in reduction of early strength, up to 14 days.

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Properties and Uses of Different Types of Concrete Admixtures

Benefits of air-entraining admixture: Increases workability of fresh concrete. Increased durability; Better resistance to freezing thaw cycles, de-icers, salts, sulfates, and alkali-silica reactivity. Difficulties: Decreases strength. The effect can be reduced in moderate strength concrete by lowering water cement ratio and increasing cement ...

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Concrete Admixtures (Additives)- Types, Selection ...

Definition of Concrete Admixtures As per BIS (IS – 9103: 1999) Page No.1, Concrete Admixture is defined as a material other than water, aggregates and hydraulic cement and additives like Pozzolana or slag and fiber reinforcement, used as on ingredient of concrete or mortar and added to the batch immediately before or during its mixing to modify one or more of the properties of concrete in ...

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Effects of Admixtures on the Properties of Corn Cob Ash ...

The study investigated the effects of admixtures on the properties of corn cob ash (CCA) cement concrete. The workability and compressive strength of CCA cement concrete incorporated with accelerator, plasticizer and water reducing and retarding were carried out. The dosage of admixture incorporated was: 0.124litre per 15.55kg of cementitious ...

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Effects of Corn Cob Ash as Mineral Admixture on Mechanical ...

The natural mineral admixture obtained from the novel agricultural by-product, namely corn cob ash (CCA), is being utilized in cement manufacturing and concrete construction. The similarities in both physical and chemical properties of CCA were established when compared to the decade old agro-based mineral admixtures like rice husk ash (RHA ...

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(PDF) Application of polymer admixtures to modify concrete ...

Application of polymer admixtures to modify concrete properties: Effects of polymer type and content ... concrete was observed by using CCA latex. ... The effects of water to cement ratio and the ...

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Effects of Chemical Admixtures in Concrete and Mortar

on limitations of concrete shrinkage, the effect of chemi­ cal admixtures on concrete durability, and the control of the uniformity of these admixtures. In the area of shrinkage control, ASTM C494-63T, Chemical Admixtures for Concrete, required that admix­ ture concrete be limited to a shrinkage of 100 micro­ inches per inch over that of a ...

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Short Communication Study on the Hydration Behavior of ...

In this work, the effects of mineral admixtures, corn cob ash (CCA) and waste plastic fiber (WPF) fillers, on mechanical properties and hydration of Portland cement (PC) were investigated. The partial replacement of both WPF and CCA in PC accelerates the setting process as compared to control PC sample without additives.

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(PDF) The effect of mineral admixtures on the properties ...

In this study the performance concrete involves appropriate selection and effect of mineral admixtures on the short- and long-term proportioning of the constituents to produce a com- properties of high-performance concrete was investi- posite mainly characterised by its low porosity and fine gated.

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Properties and Uses of Different Types of Concrete Admixtures

Benefits of air-entraining admixture: Increases workability of fresh concrete. Increased durability; Better resistance to freezing thaw cycles, de-icers, salts, sulfates, and alkali-silica reactivity. Difficulties: Decreases strength. The effect can be reduced in moderate strength concrete by lowering water cement ratio and increasing cement ...

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Effect of Thermal-cured Hydraulic Cement Admixtures on the ...

Dec 01, 2015  In the cement industry, researchers have worked on blending cement with supplementary cementitious materials (SCMs) to enhance the mechanical properties of concrete. For technical and environmental reasons, previous studies have recommended that concretes be designed with less ordinary Portland cement (OPC). Other researchers encourage the use of thermal

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Self-Compacting Concrete: Strength Evaluation of Corn Cob ...

chemical admixtures is inevitable in achieving good rheological properties of SCC [8]. Corn-cob ash has been proven to be a good substitute of cement by different researchers up to a percentage of 10% [1]; while [19] investigated effects of admixtures on the properties of corn cob ash cement concrete and

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ASTM International - Journal of Cement, Concrete and ...

High-Strength and Flowing Concrete with a Zeolitic Mineral Admixture. Principles Underlying Production of High-Performance Concrete. The Effect of Mix Design on the Properties of Sulfur Concrete. Mechanical Properties, Abrasion Resistance, and Chloride Permeability of Concrete Incorporating Granulated Blast-Furnace Slag

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Macro mechanical properties of self healing concrete with ...

Mar 01, 2019  Four stages of methodology adopted for studying the effects of self-healing of concrete samples: 1. Determination of mechanical properties of normal concrete and concrete with crystalline admixture (CA) at 28 days. 2. Creation of control damage in the specimens (a) Early age cracks (b) Structural cracks. 3. Exposure simulation. 4.

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Effect of Cement C3A Content on Properties of Cementitious ...

Aug 08, 2017  The effect of cement tricalcium aluminate (C 3 A) content on the properties of cement paste, mortar, and concrete mixtures containing high-range water-reducing (HRWR) admixture was investigated.Three commercial Type I cements prepared with the same raw material and same gypsum rock interground with clinker, but with different C 3 A contents (by changing mixture proportions), were

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(PDF) IJCIET_09_12_104.pdf IAEME Publication - Academia

Disparity in the Characterization of corncob ash (CCA) as a pozzolanic material and scant literature pertaining to its microstructural characteristics motivated the objective of this research. The study intends to narrow the knowledge gap by

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Effect of Plasticizing and Retarding Admixtures on the ...

Aug 17, 2020  The effect of porous pozzolanic polydisperse mineral components on properties of concrete. In: Blikharskyy, Z., Koszelnik, P., Mesaros, P. (eds.) Advances in Resource-Saving Technologies and Materials in Civil and Environmental Engineering 2019.

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Effect of Accelerating Admixture on Properties of Concrete

Effect of Accelerating Admixture on Properties of Concrete International organization of Scientific Research 50 P a g e increase in compressive strength was observed at 28 days with respect to reference mix. Compressive strength for concrete mix with 3% sodium nitrite by weight of cement was found to be less than that of reference mix. 1.2.2.

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Effects of different mineral admixtures on the properties ...

This paper presents a review of the properties of fresh concrete including workability, heat of hydration, setting time, bleeding, and reactivity by using mineral admixtures fly ash (FA), silica fume (SF), ground granulated blast furnace slag (GGBS), metakaolin (MK), and rice husk ash (RHA). Compari

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Effects of Superplasticizing Admixture on Properties of ...

in the advancement of chemical admixtures for Portland cement concrete. The effect of superplasticizer (SP) on properties of fresh and hardened concrete has studied; the properties of concrete inspected are compressive strength and slump test, hence, an experimental investigation conducted to determine the optimum

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Effect of Usage of Admixture in Concrete

The use of admixtures offers certain beneficial effects to concrete like improved workability, acceleration or retardation of setting time, reduce water cement ratio, and so on. There are two basic types of admixtures available: chemical mineral. Admixtures like flyash, silicate fume, slag comes in the category of mineral admixtures.

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(PDF) Effect of mineral admixtures on the properties of ...

International Journal of Advanced Structures and Geotechnical Engineering ISSN 2319-5347, Vol. 02, No. 04, October 2013 Effect of mineral admixtures on the properties of mass concrete - A review MUHAMMAD EJAZ SHABAB, KHAN SHAHZADA, MUHAMMAD ASHRAF, MUHAMMAD FAHAD Department of Civil Engineering, University of Engineering Technology Peshawar, Pakistan Email:

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Period #10 Notes: ADMIXTURES CEMENT REPLACEMENT ...

high strength concrete. As with most types of admixtures, super plasticizers can affect other concrete properties as well. The specific effects, however, should be found from the manufacturer. • The effect of superplasticizers lasts only 30 to 60 minutes, depending on the brand and dosage rate, and is followed by a rapid loss in workability.

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CEMENT AND SUPERPLASTICIZER COMBINATIONS: COMPATIBILITY ...

Sometimes a little variation in the dosage of the admixture could lead to detrimental side effects, such as segregation, excessive set retardation, or excess air content in the concrete. Results showed that the chemical composition of the cement is critical to ensure good compatibility and adequate robustness of various combinations of cements ...

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Self-Compacting Concrete: Strength Evaluation of Corn Cob ...

chemical admixtures is inevitable in achieving good rheological properties of SCC [8]. Corn-cob ash has been proven to be a good substitute of cement by different researchers up to a percentage of 10% [1]; while [19] investigated effects of admixtures on the properties of corn cob ash cement concrete and

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STUDY ON EFFECTIVENESS OF WATER PROOFING ADMIXTURES

Nov 16, 2019  9. OBJECTIVES To study the various types , properties and behaviour of water proofing admixtures in concrete. To determine permeability , setting time , compressive strength and chloride content of M25 grade concrete specimen treated with crystalline chemical admixture (water proofing compound). To study the effectiveness of crystalline ...

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Evaluation of Strength Characteristics of Laterized ...

Nov 02, 2015  Raheem A A, Oyebisi S O, Akintayo S O and Oyeniran M I 2010 Effects of admixtures on the properties of corn cob ash cement concrete Leonardo Electronic J. of Practices and Techn. 16 13-20 [5] Adesanya D A and Raheem A A 2010 A study of the permeability and acid attack of corn cob ash blended cements Construction and Building Materials 24 403e409

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IOSR Journal

Cement concrete with different concentration of admixtures were tested to deduce the admixture effect on concrete properties like consistency, workability and compressive strength. The results obtained, using both admixtures were compared using the F-statistics to check for significant difference between the concrete properties.

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EFFECT OF CORROSION INHIBITOR ON PROPERTIES OF CONCRETE

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The effect of corrosion inhibiting admixture on concrete and mortar properties is investigated experimentally. Two reference concretes and mortars are considered, based on ordinary Portland cement (OPC) and slag cement. The effect of corrosion inhibiting admixture (a sodium nitrite-based inhibitor) is evaluated.

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Self-Compacting Concrete: Strength Evaluation of Corn Cob ...

Jul 22, 2015  The paper investigates the prospects of corn-cob ash (CCA) as effective constituent in self-compacting concrete. The structural value of the composite was evaluated with consideration for its suitability as self-compacting concrete. Varied percentage of corn-cob ash at 0%, 10%, 20%, and 30% replaced cement in a mix of 1:2:4 concrete with variable plasticizer admixture of COMPLASTSP430

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Comparative Study on the Effects of Various Modified ...

This study carried out tensile tests at definite elongation, tensile and shear tests on 4 admixture-modified styrene-acrylic emulsion-based cement composites (SECCs), and measured the strength, deformation, and energy consumption indexes of test specimens, so as to investigate the influences of coalescing agent, plasticizer, silane coupling agent, and nanometer aluminium oxide on the bond ...

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