Inclusion of nano metakaolin as additive in ultra high performance concrete (UHPC)

Sidek, Muhd Norhasri Muhd; Hamidah, M. S.; Fadzil, A. Mohd; Megawati, O

doi:10.1016/j.conbuildmat.2016.09.127

Cited by 146 publications

(53 citation statements)

References 24 publications

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“…Its application as an SCM has captured the attention of researchers due to its high effectiveness in enhancing concrete properties. Likewise, its potential in producing more cohesive and dense concrete, provided that a proper dosage of superplasticiser is used, has generally contributed to its popularity in innovative concretes (lightweight concrete, high-strength concrete, Ultra-High Performance Concrete (UHPC), and Self-Compacting Concrete (SCC)) [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Use of metakaolin as supplementary cementitious material in concrete, with focus on durability properties

Bakera¹,

Alexander

2019

RILEM Tech Lett

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Numerous research efforts on metakaolin as a supplementary cementitious material (SCM) have been undertaken in the past 20 years. This material, while relatively expensive mainly due to low production volumes worldwide, nevertheless has a significantly lower production cost than Portland cement. However, industry remains tentative in considering metakaolin in concrete. This paper takes the view that industry should consider investing in the production and application of metakaolin in appropriate concrete projects, particularly in aggressive environments where plain Portland cement may be inadequate, and where other SCMs may not readily be available. The main contribution of the paper is a global review of recent studies on the use of metakaolin in different types of concrete. This international experience is then compared with results from a study on the durability performance of metakaolin concrete using local materials in the Western Cape province of South Africa, as a means of concrete performance improvement. The study investigates concrete durability properties: penetrability (sorptivity, permeability, conductivity and diffusion), mitigation of Alkali-Silica Reaction (ASR), and carbonation resistance. The concretes were prepared with three water-binder ratios (0.4, 0.5 and 0.6), and with metakaolin replacement levels of 0% (control), 10%, 15% and 20%. Performance results show that, with increasing metakaolin content, the transport properties of concrete are considerably improved, ASR expansion due to a highly reactive local aggregate decreases to non-deleterious levels, while no detrimental effect on carbonation is observed. Thus, metakaolin could serve as a valuable SCM to enhance the durability performance of concrete in local aggressive environments.

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Section: Introductionmentioning

confidence: 99%

Use of metakaolin as supplementary cementitious material in concrete, with focus on durability properties

Bakera¹,

Alexander

2019

RILEM Tech Lett

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“…The density of this mixture causes meta-kaolin to be inhibited in filling the empty space. This imperfect filler effect causes a low initial compressive strength [9]. Another possible cause with the addition of additives that interfere with compounds in the cement that play to increase the initial compressive strength of concrete is Three calcium Silicate 3Cao SiO2 (C3S) and three calcium Aluminate 3CaO Al2O3 (C3A) compounds.…”

Section: Compressive Strength Of Selfcompacting Concretementioning

confidence: 99%

“…The large surface area and than its clay-like properties that absorb water leads to an increase in the water requirement of the concrete mix. The addition of meta-kaolin causes a mixture of dry concrete due to the amount of water absorbed by meta-kaolin causing decreased workability of concrete [9].…”

Section: V-funnel T 5second Testingmentioning

confidence: 99%

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Study on effect of variations of meta-kaolin addition on Self-Compacting parameter of High Strength Concrete

Wibowo¹,

Mediyanto²,

Dharmawan³

2018

IJIE

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“…The silica fume may be partially or fully replaced and cement may be partially replaced (without compromising with the quality of UHPC) by locally available supplementary cementitious materials such as ground granulated blast furnace slag, fly ash, metakaolin, limestone powder, rice husk, steel slag powder, cement kiln dust, nanomaterials (nano-SiO2, nano-CaCO3, nano-Fe2O3, nano-TiO2), etc. [5,[8][9][10][11][12][13][14].…”

Section: Ingredientsmentioning

confidence: 99%

Use of alternative waste materials in producing ultra-high performance concrete

Ahmad

2017

MATEC Web Conf.

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Abstract. In a corrosive environment similar to that of the Arabian Gulf, use of high-performance concrete is one of the options to ensure a target service life of concrete structures. However, in absence of good quality coarse aggregates, it is a challenging task to produce high-performance concrete. Recently, the possibility of producing ultra-high-performance concrete (UHPC) has been widely reported in the literature. UHPC is produced without coarse aggregates at very low water to cementitious materials ratio, high amounts of cement, mineral admixtures, and superplasticizer along with fine quartz sand as aggregate, quartz powder as micro-filler, a nd steel fibres for fracture toughness. In the present work, an effort was made to utilize local waste materials as alternative mineral admixtures and local dune sand as aggregate in producing different UHPC mixtures without addition of quartz powder. The mechanical properties, shrinkage, and durability characteristics of the UHPC mixtures were studied. Test results indicate that it is possible to produce UHPC mixtures using alternative waste materials, which would have targeted flow, strength, toughness, and resistance against reinforcement corrosion. The information presented in the paper would help in optimum selection of a mixture of UHPC considering the availability of local materials, exposure conditions and structural requirements.

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Inclusion of nano metakaolin as additive in ultra high performance concrete (UHPC)

Cited by 146 publications

References 24 publications

Use of metakaolin as supplementary cementitious material in concrete, with focus on durability properties

Use of metakaolin as supplementary cementitious material in concrete, with focus on durability properties

Study on effect of variations of meta-kaolin addition on Self-Compacting parameter of High Strength Concrete

Use of alternative waste materials in producing ultra-high performance concrete

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