A review on use of limestone powder in cement-based materials: Mechanism, hydration and microstructures

Wang, Dehui; Shi, Caijun; Farzadnia, Nima; Shi, Zhenguo; Jia, Huangfei; Ou, Zhihua

doi:10.1016/j.conbuildmat.2018.06.075

Cited by 288 publications

(86 citation statements)

References 52 publications

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“…The leading process of LF-0 and LF-30 was NG-I-D, whereas LF-50 was NG-D; the “I” stage was missing. Thus, high limestone powder content can change the progress of the hydration kinetics, which can enhance the hydration of cement and provide more nucleation sites for C-S-H [ 3 ]. The heat of hydration rate peak was lower in the LF-30 mortar matrix than it was in LF-0 and LF-50.…”

Section: Materials and Experimentsmentioning

confidence: 99%

“…However, the effect of LP usually depends on its particle size distribution (PSD). Some scholars find that LP can enlarge the average pore size [ 3 , 47 ], whereas others found that it has a positive effect [ 48 ]. Pore classification will serve as a basis for random pore generation in the numerical simulation in the next section.…”

Section: Materials and Experimentsmentioning

confidence: 99%

“…Using limestone powder to replace fly ash as a cement-based admixture can significantly solve the fly ash shortage problem. In addition, the admixture of limestone powder with high quality [ 3 , 4 , 5 ] and low cost can reduce the cost of construction and transportation, and also solve environmental problems.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation on Hydration and Mechanical Properties of Mortar Containing Limestone Powder and Fly Ash Based on the Coupled Chemical–Thermal–Mechanical Method

Zhou

Tian

et al. 2020

Materials

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The composited cementitious materials usually have superior performance; for example, using limestone powder (LP) and fly ash (FA) as the admixtures of cement in concrete/mortar is a popular way of improving the properties of concrete/mortar structures. In this work, we performed experimental tests to study the hydration process and pore distribution in mortar containing different ratios of LP and FA. Based on the results of mercury intrusion porosimetry (MIP), a numerical mortar model with random pore is built. The model can reflect the synergistic hydration interaction and filling effect caused by the admixtures of LP and FA. After analyzing the hydration process, the coupled chemical–thermal–mechanical method was used to simulate the characteristics of mortar containing LP and FA. The coupling model can simulate the “hump-type” hydration acceleration stage of the mortar at early age, which is specifically caused by the LP, proved in the experimental test. Additionally, the special, “hump-type” stage is important to enhance the early strength of the mortar. At different levels of admixture content, the random pore model and coupled method can predict the evolution process of the mechanical properties well, at early age and for long-term strength. Both experimental and numerical results suggest that the mortar containing admixtures of the proper ratio of LP to FA have good mechanical properties, which can be applied to engineering structures.

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Section: Materials and Experimentsmentioning

confidence: 99%

Section: Materials and Experimentsmentioning

confidence: 99%

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Investigation on Hydration and Mechanical Properties of Mortar Containing Limestone Powder and Fly Ash Based on the Coupled Chemical–Thermal–Mechanical Method

Zhou

Tian

et al. 2020

Materials

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“…After being mixed with water, the materials are exposed to a series of physical and chemical reactions and then a hardened body with certain strengths was obtained as cementing pastes which gradually lose fluidity. is process is defined as hydration hardening of cementing material [55][56][57][58][59][60][61][62][63][64]. e mechanical performances of the hardened body are closely related to hydration products and microstructures of the samples, which vary during the hydration process.…”

Section: Hydration Mechanism Of Modified Composite Cementingmentioning

confidence: 99%

Optimization and Hydration Mechanism of Composite Cementing Material for Paste Filling in Coal Mines

Liu

Zhang

et al. 2019

Advances in Materials Science and Engineering

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The low early strength of materials for paste filling in mines caused by low early strength of composite cementing material has been a severe issue. In this study, the effects of sulphoaluminate cement and gypsum on strengths of composite cementing material were investigated experimentally by employing the constrained formulation uniform design. With the content of the sulphoaluminate cement below 14% and the content of the gypsum below 16%, the compressive strengths of composite cementing materials increased, especially early strength. However, the initial and final setting time does not meet the engineering requirements in this case. Optimization tests of composite additives demonstrated that H2BO3(0.3%) + Na2SO4(0.1%) and H2BO3(0.3%) + NaNO2(0.1%) were ideal setting retarding and early strengthening composite additives as they can both reduce the initial and final setting time and enhance compressive strengths of composite cementing material. Investigations by XRD and SEM revealed that the hydration products of composite cementing material were dominated by AFt (ettringite) at the early stage and by C-S-H (hydrated calcium silicate) gel + CH (calcium hydroxide) gel at the middle and late stages. The hydration products of ratio-optimized composite cementing material do not restrain each other due to the generation sequence. Instead, they grew interactively and were coupled, thus facilitating the growth of the hardened body. This study can provide references for optimization of composite cementing material for paste filling in coal mines.

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“…In order to reduce the cost of cement in concrete and to manufacture special cement for various special purposes, many worldwide scholars [1][2][3][4][5] have conducted extensive work on cement substitute materials and concrete additives. Recently, limestone cement has become a recent subject of research, owing to the promising properties of limestone for cost saving and cementing [6,7]. Siliceous limestone powder waste has cementitious activity as it can be reused to replace a part of the cement, leading to an improvement in the properties of concrete and thereby reducing contamination in soil as well as the air pollution [8,9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Incorporating Waste Limestone Powder into Solid Waste Cemented Paste Backfill Material

Ding

Ren

et al. 2019

Applied Sciences

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To effectively reuse waste limestone powder, which is a major solid waste around mines, we replaced limestone powder back into a part of cement in solid waste cemented paste backfill (SWCPB) and studied the parameters of pore structures. To optimize the pore microstructure characteristics of SWCPB in mines, two different components and grade tailings were selected. The samples were characterized by scanning electron microscopy (SEM) and nuclear magnetic resonance (NMR) to examine the pore properties and microstructure of SWCPB. The results showed that (1) at the later curing stage, with the optimization of pore characteristics and microstructure through the limestone powder admixture, the strength of SWCFB was guaranteed at a 20% replacement degree of cement. (2) Porosity, macropore proportion, and the average pore radius all negatively correlated with limestone powder content, which were reduced by 7.15%, 46.35%, and 16.37%, respectively. (3) Limestone powder as a crystal nucleus participated in the hydration reaction and was embedded into the product to enhance the strength.

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A review on use of limestone powder in cement-based materials: Mechanism, hydration and microstructures

Cited by 288 publications

References 52 publications

Investigation on Hydration and Mechanical Properties of Mortar Containing Limestone Powder and Fly Ash Based on the Coupled Chemical–Thermal–Mechanical Method

Investigation on Hydration and Mechanical Properties of Mortar Containing Limestone Powder and Fly Ash Based on the Coupled Chemical–Thermal–Mechanical Method

Optimization and Hydration Mechanism of Composite Cementing Material for Paste Filling in Coal Mines

Effect of Incorporating Waste Limestone Powder into Solid Waste Cemented Paste Backfill Material

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