Properties of cement-based materials incorporating nano-clay and calcined nano-clay: A review

Niu, Xu-Jing; Li, Qingbin; Hu, Yu; Tan, Yaosheng; Liu, Chunfeng

doi:10.1016/j.conbuildmat.2021.122820

Cited by 48 publications

(24 citation statements)

References 83 publications

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“…However, using nano-clay in concrete mixture significantly decreases the concrete porosity, especially in high cycles (Figure 20) [211]. The addition of nano-clay leads to lower permeability [212,213] and also less damage to the surface compared to the control specimen during the freeze/thaw process [176]. Since concrete is a porous material, the freeze-thaw resistance of concrete depends mainly on the structure of the material, such as porosity.…”

Section: Effect Of Clay On the Freeze-thawmentioning

confidence: 99%

Clay as a Sustainable Binder for Concrete—A Review

Mousavi

Bhojaraju²,

Ouellet-Plamondon

2021

Construction Materials

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The negative environmental impacts of Portland cement as a binder in the construction industry have created a growing impetus to develop sustainable alternative binders. Various types of clay have been considered as potential cement replacements. The impact of clays as cement replacement depends on the dosage and treatment methods. This paper presents a comprehensive review to determine the effects of different types of clay on the fresh and hardened properties of concrete mixtures by analyzing the experimental database reported by the literature, including raw, calcined, modified, nano, and organo. This study intends to show the process of optimizing the use of clay in concrete, the reason behind converting raw clay to modified types, and research gaps through a comparison study between different types of clays. The present review study shows that clay-based concrete mixtures have higher thixotropy and yield stress values, improving shape stability. This results in lower early-age shrinkage of the concrete. However, the high floc strength of clay-based concrete causes a reduction in flowability. Treatment methods of raw clay, such as calcination and nano-sized clay particles, improve concrete compressive strength. General results of the previous studies highlight that all types of clay investigated positively affect the resistance of concrete to environmental attack.

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Section: Effect Of Clay On the Freeze-thawmentioning

confidence: 99%

Clay as a Sustainable Binder for Concrete—A Review

Mousavi

Bhojaraju²,

Ouellet-Plamondon

2021

Construction Materials

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“…Nano-materials in general improve the properties of cement, but due to their high cost, their uses are limited [13,14]. On the other hand, nano-clay is economical and can be obtained in large amounts and is more effective.…”

Section: Introductionmentioning

confidence: 99%

Clays and Clay Minerals in the Construction Industry

Singh

2022

Minerals

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Clay is a naturally occurring material that can be converted to different clay minerals through thermal treatments, and can be used for the development of different products. Clays and clay minerals have been used for different applications in different sectors. Detailed information regarding the applications of these materials in the construction industry are described. Clay has been used as a supplementary cementitious material in Portland cement (OPC) mortars and concretes. These minerals decrease raw materials and CO2 emissions during the production of Portland cement clinker and, at the same time, increase the compressive strength of concrete at a later age. Therefore, they are conducive to the sustainability of construction materials. A new type of cement, Limestone calcined clay cement (LC3), and a binding material geopolymer cement have also been developed using clay minerals. The properties of these binders have been discussed. Applications of clay products for making bricks have are also described in this article.

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“…With the progress of science and technology, nano clay can significantly improve the mechanical properties of soil due to its unique physical and chemical properties, and has begun to become a new stable material in the field of construction engineering [10]. Niu et al [11] studied the mechanical properties, durability, shrinkage, hydration, and microstructure of cement-based materials modified by nano clay. The results show that an appropriate amount of nano clay is beneficial to improve the properties of cement-based materials.…”

Section: Introductionmentioning

confidence: 99%

The Elastic Modulus and Damage Stress–Strain Model of Polypropylene Fiber and Nano Clay Modified Lime Treated Soil under Axial Load

et al. 2022

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Using polypropylene fiber (PPF) and nano clay modified lime treated soil (LS), the static and dynamic properties of fiber modified lime treated soil (FLS), nano clay modified lime treated soil (NLS), and fiber nano clay composite modified lime treated soil (NFLS) were studied. Through the unconfined compressive strength (UCS) test and dynamic triaxial test of FLS, NLS, and NFLS, the static and dynamic elastic modulus characteristics at 7 day curing age were explored, and the damage stress–strain model was established. The results show that: (1) Polypropylene fiber and nano clay can significantly enhance the mechanical properties of NFLS. Nano clay can promote the reaction between lime and soil to produce calcium silicate hydrate (C-S-H) and calcium aluminate hydrate (C-A-H), thus improving the strength of NFLS, and UCS can be increased by up to 103%. Polypropylene fiber can enhance the ductility of NFLS and increase the residual ductility strength, and the residual strength can be increased by 827%. (2) Nano clay can enhance the static and dynamic elastic modulus of modified lime treated soil. The static and dynamic elastic modulus of NLS, FLS, and NFLS are linear with the change of polypropylene fiber and nano clay content. The static and dynamic elastic modulus of NLS, FLS, and NFLS are linear, exponential, and logarithmic, respectively. (3) The mesoscopic random damage model can characterize the stress–strain relationship of NFLS. Polypropylene fiber and nano clay can improve the ductility and strength of modified LS, and the composite addition of polypropylene fiber and nano clay can improve the ability of modified LS to resist damage.

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Properties of cement-based materials incorporating nano-clay and calcined nano-clay: A review

Cited by 48 publications

References 83 publications

Clay as a Sustainable Binder for Concrete—A Review

Clay as a Sustainable Binder for Concrete—A Review

Clays and Clay Minerals in the Construction Industry

The Elastic Modulus and Damage Stress–Strain Model of Polypropylene Fiber and Nano Clay Modified Lime Treated Soil under Axial Load

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