Microstructural development in an ultrafine cement — Part II

Sarkar, S.; Wheeler, J.

doi:10.1016/s0008-8846(00)00394-x

Cited by 11 publications

(2 citation statements)

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“…Particle size distribution of P.O 42.5′ and P.O 52.5′ clinkers are similar to those of P.O 42.5 and P.O 52.5 cement, respectively. The average particle size (X av = 2.763 μm) and the maximum particle size (X max = 10.825 μm) of SC clinker completely meet the technical requirements of superfine cement (X av < 5 μm, X max < 10.825 μm) [ 39 ]. Therefore, the materials used in the subsequent tests are P.O 42.5′, P.O 52.5′, and SC, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Preparation and Mechanical Properties of Low Carbon Cementitious Materials with Superfine Cement Reverse Filling High-Volume Mineral Admixtures

2023

Materials

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In order to increase the content of mineral admixtures in cement, this study proposes a method for preparing a high-volume mineral admixture cementitious material (HMAC) using superfine cement as a reverse filling material. Firstly, superfine cement is prepared through mechanical grinding. Then, the activity of mineral admixtures (such as slag and fly ash) is enhanced by mechanical grinding, sulfate activation, and alkali activation methods. Meanwhile, the evolution of HMCM from microstructure to macroscopic mechanical behavior is studied by combining a laser particle size analyzer and a scanning electron microscope. Furthermore, the reverse filling mechanism of superfine cement on mineral admixtures under different activation conditions is proposed. Results show that superfine cement can largely improve the utilization rate of cement clinker and the compressive strength of cementitious materials. In the condition that the compressive strength is not lower than that of the control group (without mineral admixture), the content of mineral admixture can be increased to 50%, 70%, and 90% after mechanical grinding, sulfate activation, and alkali activation, respectively. Analysis indicates that the reverse filling effect of superfine cement is the main reason for improving the density of the HMCM.

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Section: Resultsmentioning

confidence: 99%

“…Existing studies [ 39 , 40 ] have shown that the utilization of superfine cement can exceed 80%. Shondeep L. Sarkar [ 41 ] pointed out two main drawbacks of refined cement particles, namely, late strength regression and faster setting time.…”

Section: Introductionmentioning

confidence: 99%