Effect of rice husk ash and other mineral admixtures on properties of self-compacting high performance concrete

Le, Ha Thanh; Ludwig, Horst‐Michael

doi:10.1016/j.matdes.2015.09.120

Cited by 134 publications

(70 citation statements)

References 34 publications

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“…2 Some researchers in China and abroad have also studied the application of RHA to HPC, and their results showed that the addition of active RHA greatly promotes the hydration reaction of cement, improves the microstructure of concrete, and increases the strength of concrete. [3][4][5] In addition, concrete mixed with RHA showed good durability properties in terms of frost resistance, impermeability, and resistance to chemical attack. [6][7][8][9] This suggests that RHA can potentially be a type of active mineral admixture.…”

Section: Introductionmentioning

confidence: 99%

Effect of Rice Husk Ash on High-Temperature Mechanical Properties and Microstructure of Concrete

2017

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Effects of rice husk ash (RHA) on the strength and temperature resistance of concrete were investigated. Different amounts of cement in concrete were replaced by RHA and fly ash (FA), used as mineral admixtures, under the condition of a constant binder content. The compressive strength and temperature resistance were tested at different temperatures. The results show that mixing concrete with the appropriate amounts of RHA can improve its compressive strength. At 800 °C, the strength is 50 % greater than that of normal concrete (NC). Thus, RHA can improve the strength and temperature resistance of concrete.

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Section: Introductionmentioning

confidence: 99%

Effect of Rice Husk Ash on High-Temperature Mechanical Properties and Microstructure of Concrete

2017

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“…(19) reduces to: The long-term strength activity index can be extended for predicting strength Activity index for different ages and different surface areas. The coefficients could be obtained by curve fitting of data from tests carried out by many investigators such as [3,[9][10][11][12]. Details will be out of the scope of this technical paper and will be discussed in the authors' complete research project [13].…”

Section: Optimum Replacement Of Cement By Fly Ashmentioning

confidence: 99%

Statistical Analyses of Optimum Partial Replacement of Cement by Fly Ash Based on Complete Consumption of Calcium Hydroxide

Ouypornprasert

Traitruengtatsana²,

Kamollertvara³

2016

MATEC Web of Conferences

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Abstract. The objectives of this technical paper were to propose the optimum partial replacement of cement by fly ash based on the complete consumption of calcium hydroxide from hydration reactions of cement and the long-term strength activity index based on equivalent calcium silicate hydrate as well as the propagation of uncertainty due to randomness inherent in main chemical compositions in cement and fly ash. Firstly the hydration-and pozzolanic reactions as well as stoichiometry were reviewed. Then the optimum partial replacement of cement by fly ash was formulated. After that the propagation of uncertainty due to main chemical compositions in cement and fly ash was discussed and the reliability analyses for applying the suitable replacement were reviewed. Finally an applicability of the concepts mentioned above based on statistical data of materials available was demonstrated. The results from analyses were consistent with the testing results by other researchers. The results of this study provided guidelines of suitable utilization of fly ash for partial replacement of cement. It was interesting to note that these concepts could be extended to optimize partial replacement of cement by other types of pozzolan which were described in the other papers of the authors.

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“…The determination of the real progress of volume changes of concrete has received increased attention from civil engineers and concrete producers in recent years. This is connected mainly with the development of new concretes as far as composition and production technology is concerned [3,[8][9][10]. Scientific sources describe a number of approaches for determining the value of concrete shrinkage [5,11,12].…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis on Shrinkage and Swelling in Ordinary Concrete

Daněk

Kucharczyková

Misák

et al. 2017

Advances in Materials Science and Engineering

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The paper deals with the experimental determination of shrinkage development during concrete ageing. Three concrete mixtures were made. They differed in the amount of cement in the fresh mixture, 300, 350, and 400 kg/m 3 . In order to determine the influence of plasticiser on the progress of volume changes, another three concrete mixtures were prepared with plasticiser in the amount of 0.25% by cement mass. Measurements were performed with the goal of observing the influence of cement and plasticiser content on the overall development of volume changes in the concrete. Changes in length and mass losses of the concrete during ageing were measured simultaneously. The continuous measurement of concrete mass losses caused by drying of the specimen's surface proved useful during the interpretation of results obtained from the concrete shrinkage measurement. During the first 24 hours of ageing, all the concrete mixtures exhibited swelling. Its magnitude and progress were influenced by cement, water, and plasticiser content. However, a loss of mass caused by water evaporation from the surface of the specimens was also recorded in this stage. The measured progress of shrinkage corresponded well to the progress of mass loss.

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Effect of rice husk ash and other mineral admixtures on properties of self-compacting high performance concrete

Cited by 134 publications

References 34 publications

Effect of Rice Husk Ash on High-Temperature Mechanical Properties and Microstructure of Concrete

Effect of Rice Husk Ash on High-Temperature Mechanical Properties and Microstructure of Concrete

Statistical Analyses of Optimum Partial Replacement of Cement by Fly Ash Based on Complete Consumption of Calcium Hydroxide

Experimental Analysis on Shrinkage and Swelling in Ordinary Concrete

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