Dosage of Metakaolin in High Performance Concrete

Ženíšek, Michal; Vlach, Tomáš; Laiblová, Lenka

doi:10.4028/www.scientific.net/kem.722.311

Cited by 8 publications

(6 citation statements)

References 4 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…• the optimal amount of SCM is close to 10%, which was also found in other studies [28], • the strength increase, caused by the SCMs, is the highest at 28 days of age. After that, in all cases, a proportionally smaller strength increase was measured.…”

Section: Research Objectivessupporting

confidence: 87%

Cellular concrete waste as an economical alternative to traditional supplementary cementitious materials

Gyurkó

Szijártó

Nemes

2019

J Therm Anal Calorim

View full text Add to dashboard Cite

Traditional supplementary cementitious materials (SCMs), like metakaolin or microsilica, highly improve various properties of concrete, making it more resistant against the effects of the environment. However, the cost of concrete is highly influenced by the applied amount of SCMs. Cellular concrete powder (CCP) is a by-product, produced by the cutting and curving process of cellular concrete blocks, which has the possibility to be used for similar purposes as SCMs. The present paper introduces the results of the laboratory experiments, conducted by the authors, and their analysis. The experiments were designed to investigate the effects of CCP on mortars, normal and high-strength concretes in terms of strength and durability. To get a deeper understanding of the processes taking place in a mortar or concrete containing CCP, thermogravimetric analysis was performed as well. CCP was applied in the mixes in different amount, and the performance of CCP was compared to SCMs. CCP was found to be a feasible alternative to SCMs in case of normal-strength concrete, while in case of high-strength concrete it did not improve the strength of the reference concrete. It could be traced back to the sulfate swelling of CCP particles. In optimal dosage, CCP was found to be preferable to metakaolin (MK) for durability characteristics. The combined usage of CCP and MK was investigated as well, but it did not result a concrete with better performance than the reference mix.

show abstract

Section: Research Objectivessupporting

confidence: 87%

Cellular concrete waste as an economical alternative to traditional supplementary cementitious materials

Gyurkó

Szijártó

Nemes

2019

J Therm Anal Calorim

View full text Add to dashboard Cite

show abstract

“…Our aim was to collect a large database and, therefore, all test results of mechanical properties of concrete with MK conducted based on international standards were collected for use in this study. This database was collected from 45 published studies [ 4 , 15 , 16 , 17 , 18 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 ] and is shown in the supplementary document . In the supplementary document, Tables S1–S3 contain the information of input parameters and output for

…”

Section: Data Collectionmentioning

confidence: 99%

“…Table S3: Experimental database of FS of concrete with metakaolin. References [ 4 , 15 , 16 , 17 , 18 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 72 , 73 ] are cited in the supplementary materials.…”

mentioning

confidence: 99%

Application of Machine Learning Techniques for Predicting Compressive, Splitting Tensile, and Flexural Strengths of Concrete with Metakaolin

et al. 2022

View full text Add to dashboard Cite

The mechanical properties of concrete are the important parameters in a design code. The amount of laboratory trial batches and experiments required to produce useful design data can be decreased by using robust prediction models for the mechanical properties of concrete, which can save time and money. Portland cement is frequently substituted with metakaolin (MK) because of its technical and environmental advantages. In this study, three mechanical properties of concrete with MK, i.e., compressive strength (f′c), splitting tensile strength (fst), and flexural strength (FS) were modelled by using four machine learning (ML) techniques: gene expression programming (GEP), artificial neural network (ANN), M5P model tree algorithm, and random forest (RF). For this purpose, a comprehensive database containing detail of concrete mixture proportions and values of f′c, fst, and FS at different ages was gathered from peer-reviewed published documents. Various statistical metrics were used to compare the predictive and generalization capability of the ML techniques. The comparative study of ML techniques revealed that RF has better predictive and generalization capability as compared with GEP, ANN, and M5P model tree algorithm. Moreover, the sensitivity and parametric analysis (PA) was carried out. The PA showed that the most suitable proportions of MK as partial cement replacement were 10% for FS and 15% for both f′c and fst.

show abstract

“…There are many researchers who investigated the effect of metakaolin on the properties of concrete. It was found that the optimal dosage of metakaolin as additive in high performance concrete is between 0 to 25% of the cement mass [9]. By using cement supplementary materials in the aggregate, small particles are introduced in the mix, which strengthens the material and increases its durability as well [10].…”

Section: Literature Reviewmentioning

confidence: 99%

Effect of Cellular Concrete Powder on Durability of Normal Strength Concrete

Gyurkó

Szijártó

Abed

et al. 2018

Architecture, Civil Engineering, Environment

View full text Add to dashboard Cite

A b s t r a c t Present research program is dealing with the effects of cellular concrete powder (CCP) on the compressive strength and durability of concrete. CCP is an industrial by-product, which was applied as supplementary cementitious material (SCM) in the concrete mix. In the previous research of the authors of this paper, it was found that the cellular concrete powder, applied as an additive to the concrete mix, can increase the compressive strength and the resistance against freezing of concrete [1]. In that paper, the results were compared to a reference mix and a mix that contains air-entraining agent, which is a typical solution to increase concrete durability. Increasing of durability can be achieved by the application of supplementary materials, like silica-fume or metakaolin. Present paper is dealing with the comparison of concrete with metakaolin and cellular concrete powder, on the basis of compressive strength and frost resistance, using them as a cement substituting material. Different amount of metakaolin and CCP were added to the concrete mix, by substituting a given percentage (3, 10 or 17%) of cement with them. The results show the positive effect of both supplementary materials and based on present research the maximum amount of useful CCP can be approximated for the given concrete mix. S t r e s z c z e n i e Przedstawiony program badawczy dotyczy wpływu sproszkowanego betonu komórkowego (CCP) na wytrzymałość betonu na ściskanie i jego trwałość. CCP jest przemysłowym produktem ubocznym, który został zastosowany jako dodatek do cementu w mieszance betonowej. W poprzednich badaniach autorów tego artykułu stwierdzono, że sproszkowany beton komórkowy, stosowany jako dodatek do mieszanki betonowej, może zwiększać wytrzymałość na ściskanie i odporność na zamarzanie betonu [1]. W tym artykule porównano wyniki z mieszanką referencyjną i mieszanką zawierającą domieszkę napowietrzającą, co jest typowym rozwiązaniem zwiększającym trwałość betonu. Zwiększenie trwałości można osiągnąć przez zastosowanie dodatków w postaci pyłu krzemionkowego lub metakaolinu. W niniejszym artykule przedstawiono porównanie betonu z metakaolinem i sproszkowanym betonek komórkowym w odniesieniu do wytrzymałości na ściskanie i mrozoodporności, wykorzystując te dodatki jako materiał zastępujący cement. Do mieszanki betonowej dodano różne ilości metakaolinu i CCP, zastępując nimi określony procent (3, 10 lub 17%) cementu. Wyniki badań pokazują pozytywny wpływ obu dodatków i pozwalają wyznaczyć dla danej mieszanki betonowej maksymalną przybliżoną wartość CCP. K e y w o r d s : Cellular concrete; SCM; Durability; Normal strength; Waste material.

show abstract

Dosage of Metakaolin in High Performance Concrete

Cited by 8 publications

References 4 publications

Cellular concrete waste as an economical alternative to traditional supplementary cementitious materials

Cellular concrete waste as an economical alternative to traditional supplementary cementitious materials

Application of Machine Learning Techniques for Predicting Compressive, Splitting Tensile, and Flexural Strengths of Concrete with Metakaolin

Effect of Cellular Concrete Powder on Durability of Normal Strength Concrete

Contact Info

Product

Resources

About