Assessment of pore structure evolution in the limestone calcined clay cementitious system and its implications for performance

Dhandapani, Yuvaraj; Santhanam, Manu

doi:10.1016/j.cemconcomp.2017.08.012

Cited by 218 publications

(54 citation statements)

References 13 publications

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“…However, the MIP technique is still considered an appropriate method and an invaluable tool for comparing the pore structure characteristics of cement-based materials [48]. In several studies [49], the estimated pore structure has been shown to be reliable for similar testing methods and the conditioning of samples.…”

Section: Mercury Intrusion Porosimetrymentioning

confidence: 99%

Experimental Investigation of the Macroscopic Behavior and Microstructure Property Evolution of Hardened Cement Consolidated Tailings

Sun

Hou

2019

Minerals

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Surface cement consolidated tailings disposal has recently been proposed to manage tailings in the modern mining industry because it can reduce or eliminate the disadvantages of traditional tailings storage. In this study, the evolution of the macro performance and microstructure characteristics of cement consolidated tailing samples during the curing period were determined by unconfined compressive strength tests, permeability tests, scanning electron microscopy (SEM) observations, and mercury intrusion porosimetry (MIP) tests, respectively. The results show that the curing time notably affected the macro performance and microstructural properties of the hardened cement consolidated tailings samples. As the curing age increases, the compressive strength increases nonlinearly and the growth rate decreases; the permeability decreases rapidly first, then gradually stabilizes, and finally reaches a stable value; the morphology of the hydration products and microstructures continues to evolve with the hydration process; the total pore volume decreases slightly, whereas the critical pore size decreases significantly. The proportion of the pore volume in different pore size ranges can also be affected by the curing age, which results in a large pore (>200 nm) decrease, and the small pores (<200 nm) increased. In this process, the filling effect plays a major role.

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Section: Mercury Intrusion Porosimetrymentioning

confidence: 99%

Experimental Investigation of the Macroscopic Behavior and Microstructure Property Evolution of Hardened Cement Consolidated Tailings

Sun

Hou

2019

Minerals

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“…Nevertheless, MIP technique provides a reliable comparison of pore structures of cementitious materials by utilizing the same experimental parameter including drying process, surface tension and contact angle of mercury, pressurisation rate, sample mass and number of specimens. MIP experiment has also been widely-accepted for investigating pore structure of cementitious blended systems including LC3based system (Berodier and Scrivener 2015;Dhandapani and Santhanam 2017;Tironi et al 2017). Calcined clay and limestone can contribute to reducing the quantity of pores bigger than 0.1µm in comparison with GP cement pastes (GPC-50 and GPC-30).…”

Section: Upv Surface Resistivity Bulk Density and Pore Structurementioning

confidence: 99%

Engineering Properties of Limestone Calcined Clay Concrete

Nguyen

Khan

Castel

2018

ACT

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In this paper, various engineering properties of both fresh and hardened concrete with various limestone and calcined clay contents are investigated. Two concrete grades were considered: 50 MPa or 30 MPa average 28 days compressive strength. A low grade calcined clay was used with about 50% amorphous phase. A reduction in concrete workability was observed with the increase in General Purpose (GP) cement substitution. Superplasticiser was required to obtain a slump equivalent to that of reference GP cement concrete. With 15% GP cement replacement rate, the 28 days compressive strength achieved was superior to that of reference grade 50 MPa concrete, reaching 58 MPa. However, the average 28 days compressive strength reduced significantly with 30% and 45% GP cement replacement, reaching about 35 MPa. Considering concretes with similar 28-day compressive strength, results showed that the 7-day compressive strength was only marginally affected by the limestone and calcined clay substitution. Mercury intrusion porosimetry results revealed that incorporating calcined clay and limestone led to significant refinement of the porosity: increase in the quantity of pores inferior to 0.01µm and reduction in the quantity of coarse pores (with size > 0.1 µm).

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“…Dhandapani and Santhanam [64] created a viable low clinker bond mix by consolidating calcined earth and limestone. The hydrate stage was considered by XRD.…”

Section: Morphology By X-beam Diffraction (Xrd) and Checking Electronmentioning

confidence: 99%

Influence of Pottery Clay in Cement Mortar and Concrete Mixture: A Review

Saffar¹,

Tayeh²

2018

IJET

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Solid generation has brought about numerous natural issues, for example, CO2 discharge. An option eco-accommodating concrete, known as green cement, ought to be investigated. Squander materials from marine waste, ventures, and farming can be reused to deliver green cement. This paper displays a survey of ongoing advancement identified with the attainability of utilizing stoneware earth in solid blend. The report centers around the likelihood of using dirt block squander as fractional substitution for Portland bond in cement and the properties of crisp and solidified concrete, for example, usefulness, thickness, quality, and microstructure. This paper ought to give new data on the uses of greener and supportable stoneware mud concrete. Past investigations showed that the ideal rate for supplanting Portland concrete with earthenware dirt ran somewhere in the range of 10wt% and 30wt%.

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Assessment of pore structure evolution in the limestone calcined clay cementitious system and its implications for performance

Cited by 218 publications

References 13 publications

Experimental Investigation of the Macroscopic Behavior and Microstructure Property Evolution of Hardened Cement Consolidated Tailings

Experimental Investigation of the Macroscopic Behavior and Microstructure Property Evolution of Hardened Cement Consolidated Tailings

Engineering Properties of Limestone Calcined Clay Concrete

Influence of Pottery Clay in Cement Mortar and Concrete Mixture: A Review

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