— Abstract. This study aims to enhance the durability, cost-effectiveness, and sustainability of recycled fine aggregate concrete (RFAC) subjected to the combined …
Metakaolin which is commonly used as an admixture or partial replacement of cement owing to its most effective pozzolanic properties, which improve the microstructure and strengthen the...
— Under high temperature, compressive and flexural strength of concrete incorporated with nano metakaolin shows increase in strength values up to temperature exposure of 250 °C . TiO 2 ... Literature witnessed that size of pores and particles geometry is responsible for the capillary water absorption mechanism. Addition of nanomaterial …
In recent years, there has been a growing body of research on the use of metakaolin (MK) in Ultra-High Performance Concrete (UHPC) to address the issue of unstable production yields and quality of industrial by-product Silica fume (SF). However, the current scientific literature tends to focus primarily on performance enhancements, often neglecting to …
— To explore the potential of modified recycled aggregate concrete for use in construction projects, the evolution of its properties in the combined effects of environment and loading was investigated. This paper considered various factors, including the replacement amount of metakaolin (0 %, 15 %), dry-wet cycles (0, 20, 60, and 120 …
— Effect and mechanism of coal gangue concrete modification by fly ash. Constr. Build. Mater., 294 (2021), p. 123563. View PDF View article View in Scopus Google Scholar [30] ... Study on composite salt Corrosion resistance of concrete by metakaolin. Nonmetallic Ores, 201, 44(01):78-80+95. Google Scholar [41] Chaohua Jiang, Ke Fan, …
— The intent of this study is to explore the physical properties and long-term performance of concrete made with metakaolin (MK) as a binder, using microsilica (MS) and nanosilica (NS) as substitutes for a portion of the ordinary Portland cement (OPC) content. The dosage of MS was varied from 5% to 15% for OPC-MK-MS blends, and the dosage …
DOI: 10.1016/j.cemconres.2024.107442 Corpus ID: 267342853; Dissolution behaviors and mechanisms of metakaolin in acidic activators @article{Bu2024DissolutionBA, title={Dissolution behaviors and mechanisms of metakaolin in acidic activators}, author={Mengxin Bu and Qingrui Yang and Penghui Wang and Biqin Dong and …
— This paper presents a critical review of the engineering properties of metakaolin (MK) based concrete exposed to chloride attack. The key advantages and …
— Possible mechanism of metakaolin influencing MPC was proposed by multi-analysis. ... Relative strength, pozzolanic activity and cement hydration in superplasticised metakaolin concrete. Cem. Concr. Res., 26 (10) (1996), pp. 1537-1544. View PDF View article View in Scopus Google Scholar [27]
DOI: 10.1016/j.dibe.2024.100332 Corpus ID: 267011116; Study on mechanical properties and mesoscopic damage mechanism of metakaolin modified recycled aggregate concrete @article{Bai2024StudyOM, title={Study on mechanical properties and mesoscopic damage mechanism of metakaolin modified recycled aggregate concrete}, author={Wei Feng Bai …
Fig.4: Drying Shrinkage of Controlled Concrete and Metakaolin Concrete. Durability of Hardened Concrete Incorporating Highly Reactive Metakaolin Air entrained concrete containing about ten percent of metakaolin by mass supremely withstand ingression of chloride ions and has outstanding durability to repeated cycles of freezing and thawing ...
— Geopolymers, which belong to the family of inorganic polymers, have emerged as a promising alternative to traditional cement-based materials due to their …
Download Citation | On Dec 1, 2023, Wei Song and others published Durability study and mechanism analysis of red mud-coal metakaolin geopolymer concrete under a sulfate environment | Find, read ...
— Dissolution behaviors and mechanisms of metakaolin in acidic activators. Author links open overlay panel Mengxin Bu a, Qingrui Yang a, Penghui Wang a, Biqin Dong a, Dongshuai Hou b, Yanshuai Wang a. Show more. ... A damage constitutive model for concrete under uniaxial compression capturing strain localization. Cement and …
— Introduction. High-reactivity metakaolin 1 () is a mineral admixture, which is relatively new to the concrete industry that has the potential for improving the durability of concrete. differs from the more commonly used mineral admixtures, such as fly ash and silica fume, in that it is not a by-product; it is manufactured under a carefully …
In recent years, there has been a growing body of research on the use of metakaolin (MK) in Ultra-High Performance Concrete (UHPC) to address the issue of unstable production yields and quality of industrial by-product Silica fume (SF).
— Since the middle of the 20th century, extensive research work has been carried out on the production and characterization of metakaolin, on the hydration reaction mechanism, as well on the study ...
— This paper presents a critical review of the engineering properties of metakaolin (MK) based concrete exposed to chloride attack. The key advantages and limitations of using MK for concrete ...
— This paper delves into an in-depth exploration of the diverse applications of fly ash and metakaolin in geopolymer concrete, highlighting its contributions to the construction industry, environmental sustainability, and technological advancements. ... Liu JC, Wu B (2021) Mechanical properties and reaction mechanism of one-part geopolymer ...
— Nano-metakaolin (NMK) is currently developed and applied in the concrete, and there are a mass of literatures on the properties of concrete with NMK until now. …
Request PDF | On May 1, 2024, Mengya Li and others published Using metakaolin to improve properties of aged Portland cement: Effectiveness and the mechanism | Find, read and cite all the research ...
— Metakaolin, produced by calcining kaolinite at high temperature, is a pozzolanic material, suitable to be used in concrete mixes. This paper reviews the research published on effects of using...
— Fly ash and silica fume is used to improve the resistance of concrete to the attack in aggressive environments [2], [3]. Recently, some activated materials such as metakaolin, which is produced by heating kaolinite, have been shown to be an excellent pozzolan. ... To study the mechanism of the metakaolin–lime reaction, measurements of …
— Fig. 7 demonstrates that arsenic is released due to the partial oxidation of lollingite, and the immobilization mechanism of the released arsenic can be described as follows: (i) ... Microstructural studies on eco-friendly and durable Self-compacting concrete blended with metakaolin. Appl. Clay Sci., 124–125 (2016), pp. 143-149.
— The experimental investigation is done on the fresh concrete (slump test) and hardened concrete (compressive strength, split tensile strength and flexural strength) of flyash-metakaolin based geopolymer concrete. 5.1 Mix Design. In this study M30 grade conventional concrete was used as control mix.
— Over the past few decades, ultrahigh-performance concrete (UHPC) has been widely studied and applied because of its outstanding mechanical properties, such as its high strength and notable durability. However, because of its high cost and easy shrinkage cracking during early pouring in mass concrete construction, to reduce the cost of UHPC …
— This study investigates the effect of variable percentages of metakaolin (MK) on the mechanical and durability performance of concrete. Kaolin clay (KC) was used in the current research to prepare the MK by the calcination process; it was ground in a ball mill to its maximum achievable fineness value of 2550 m 2 /Kg.
Supplementary cementing materials. Daman K. Panesar, in Developments in the Formulation and Reinforcement of Concrete (Second Edition), 2019 3.1.4 Metakaolin. Metakaolin is an amorphous aluminosilicate that is a highly reactive natural pozzolan produced by the calcination and dehydroxilation of kaolinitic clay at temperatures …
— 1. Introduction. Concrete material is extensively used in modern construction industry duo to its economy, reliability and applicability [1].In the various components of concrete, aggregate accounts for more than 60% of the total volume [2].The world consumes about 40 billion tons of aggregate every year [3], and the mining of …
— While metakaolin, a widely used active admixture in concrete, has been extensively studied, its interaction with ground quartz and wollastonite is not as well …
— When 10, 20, 40, 80, and 120 cycles were reached, the compressive strength and the mass of various groups of metakaolin concrete were tested. And the compressive-strength operation was performed according to GB/T50081-2002 specifications (GB/T 50081-2002, 2002).Since the test samples adopted in this test are …
— Nano materials have been widely used to improve the properties of cementitious materials.Nano-metakaolin (NMK) is currently developed and applied in the concrete, and there are a mass of literatures on the properties of concrete with NMK until now. However, a systematic review of the utilization of NMK in concrete is lacked, which …
suitability of partially replacing cement with metakaolin in self curing concrete is also studied. 1.2 Mechanism of Self Curing It is important to know the mechanism behind the process of internal curing. In normal concrete what usually happens is the continuous evaporation of moisture from an exposed surface due to the difference in
