effects of admixtures on the properties of cca cement

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Effects of Admixtures on the Properties of CCA Cement

2018-10-2  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 BS EN 934-2.The results revealed that admixtures generally improve the workability of corn cob ash cement concrete. The compressive strength obtained at 28th day for concrete without admixture (The Control) was 29.82N/mm2, while for concrete with accelerator, plasticizer, and water reducing and retarding it was 32.80 N/mm2, 38.51 N/mm2 and 34.09 N/mm2 respectively. These results showed that CCA cement concrete

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

Raheem et, al (2010) had investigated the effects of admixtures on the properties of CCA cement concrete [18]. Raheem (2008) studied the workability and compressive strength characteristics of CCA ...

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The Effect of Admixtures on Concrete Properties - CORE

2021-8-9  The Effect of Admixtures on Concrete Properties ... the properties of concrete are governed by the properties of the two phases and also by the presence of interface between them. In its hardened state concrete is a rock_ like materials with a high compressive strength, by virtue of the ease with which fresh concrete in its plastic state may ...

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Effect of Selected Admixtures on the Properties of ...

2015-1-1  The absorption test results indicate that the concrete with admixtures shows lower absorption values. This is associated with a densification of the cement paste.

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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

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Effects of Different Mineral Admixtures on the Properties ...

The reported benefits of mineral admixtures are often associated with the harden properties of concrete; however, mineral admixtures may also influence the properties of wet concrete between the time of mixing and hardening in one or more of the following ways such as they may affect water demand, heat of hydration, setting time, bleeding, and reactivity.

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Properties and Uses of Different Types of Concrete Admixtures

2013-4-5  Air entraining concrete admixtures produce tiny air bubbles in the hardened concrete to provide space for the water to expand upon freezing. How do they work? They are anionic (water-hating) agents that form tough, elastic, air-filled bubbles. These bubbles reduce stresses caused by movement or freezing of water.

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The effects of modifying additives and chemical admixtures ...

2016-11-30  The effects of additives and admixtures on the properties of fresh cement paste3.1.1. Water content. At the beginning of the experiment, there was initially determined a water content in the mixtures of fresh cement paste ensuring diameter of the spreaded sample (150 ± 5 mm).

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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 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 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 ). Comparison of normal and high-strength concrete in which cement has been partially ...

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Properties and Uses of Different Types of Concrete Admixtures

Table: Effect of Mineral Admixtures on Hardened Concrete. Quality Measure. Effect. Strength. Fly ash increases the ultimate strength but reduces rate of strength gain. Silica fume has less effect on rate of strength gain than pozzolans. Drying shrinkage and creep. Low concentrations usually have single effect.

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Effect of Corrosion Inhibitor Admixtures on Properties of ...

2020-9-19  Effect of Corrosion Inhibitor Admixtures on Properties of Fresh and Hardened Concrete Taha Ahmed1, Ibrahim Abdel-Latif2, Yehia Abdelzaher Ali3 ABSTRACT—The corrosion of the reinforcement concrete structures is a significant problem for concrete infrastructures which leads to forming

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Effect of admixtures on the properties of fresh mortar and ...

Some effects of vibration and handling on concrete containing entrained air. Journ. Am. Concr. Inst. 24 (1952/53): 1. Google Scholar [1958] Danielsson, U. and Wastesson, A. The frost resistance of cement paste as influenced by surface active agents. Swedish Cement and Concrete Research Institute. Proc. 30 Stockholm 1958.

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Effects of different composite mineral admixtures on the ...

2021-5-13  Effects of different composite mineral admixtures on the early hydration and long-term properties of cement-based materials: A comparative Construction and Building Materials ( IF 6.141) , DOI: Jianwei Sun, Peng Zhang

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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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Chemical Admixtures - Portland Cement Association

Accelerating admixtures are especially useful for modifying the properties of concrete in cold weather. Superplasticizers , also known as plasticizers or high-range water reducers (HRWR), reduce water content by 12 to 30 percent and can be added to concrete with a low-to-normal slump and water-cement ratio to make high-slump flowing concrete.

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Effects of Chemical Admixtures on the Working and ...

2019-7-30  In this experiment, different admixtures were utilized to investigate and analyze the properties of commondry-mixedmortar.emixisshowninTable4. 2.2.1. Consistency Test. In this test, the consistency of the fresh mortar is measured by using a mortar consistency meter according to the Chinese standard JGJ70-2009, as showninFigure1.

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Influence of Water-Reducing Admixtures on Properties of ...

1980-1-1  Relative effects of various admixtures on a portland cement are illustrated, and influences of specific admixtures on different cements are also shown. Effects of different superwater-reducing admixtures and combinations of ordinary and superwater-reducing admixtures are compared.

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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 ). Comparison of normal and high-strength concrete in which cement has been partially ...

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The Effect of Mix Design on the Properties of Sulfur Concrete

The deterioration is accompanied by a decrease in dynamic modulus of elasticity with time. The durability of sulfur concretes containing glycerin and crude oil admixtures was slightly improved, but expansions were still unacceptably high. Two silane admixtures significantly decreased the moisture expansions.

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Properties and Uses of Different Types of Concrete Admixtures

Table: Effect of Mineral Admixtures on Hardened Concrete. Quality Measure. Effect. Strength. Fly ash increases the ultimate strength but reduces rate of strength gain. Silica fume has less effect on rate of strength gain than pozzolans. Drying shrinkage and creep. Low concentrations usually have single effect.

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Effects of different mineral admixtures on the properties ...

2014-2-18  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).Comparison of normal and high-strength concrete in which cement has been partially supplemented by ...

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Effects of calcined clay, sawdust ash and chemical ...

Effects of calcined clay, sawdust ash and chemical admixtures on Strength and Properties of concrete for pavement and flooring applications using Taguchi approach Temitope Funmilayo Awolusi a, Adebayo Olatunbosun Sojobi b, c, **, Daniel Oluwafemi Oguntayo d, e,

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Effect of Plasticizing and Retarding Admixtures on the ...

2020-8-17  That’s why it is compulsory to use retarders and plasticizers if high strength concrete is designed. In this article the influence of plasticizers and retarder on properties of cement paste, fresh and hardened concrete was studied, because it is important to enhance the workability and slump retention of such concrete under hot weather.

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Review Article Effects of Different Mineral Admixtures on ...

2019-7-31  uence the properties of wet concrete between the time of mixing and hardening in one or more of the following ways such as they may a ect water demand, heat of hydration, setting time, bleeding, and reactivity. In the authors view, there is no literature that summarizes the e ect of these mineral admixtures on the properties of fresh concrete.

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

The paper presents a laboratory study on the influence of two mineral admixtures, silica fume (SF) and fly ash (FA), on the properties of superplasticised high-performance concrete. Assessment of the concrete mixes was based on short- and long-term

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Chemical Admixtures - Portland Cement Association

Accelerating admixtures are especially useful for modifying the properties of concrete in cold weather. Superplasticizers , also known as plasticizers or high-range water reducers (HRWR), reduce water content by 12 to 30 percent and can be added to concrete with a low-to-normal slump and water-cement ratio to make high-slump flowing concrete.

Get Price