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Your search keyword '"Zhu, Jianping"' showing total 20 results
Start Over Author "Zhu, Jianping" Journal construction and building materials
20 results on '"Zhu, Jianping"'

18. Internal curing of mortar with low water to cementitious materials ratio using a normal weight porous aggregate

Author

Zou, Dinghua, Zhang, Haoran, Wang, Yuli, Zhu, Jianping, and Guan, Xuemao

Subjects
Concrete -- Analysis -- Mechanical properties, Aggregates (Building materials) -- Analysis -- Mechanical properties, Cement -- Analysis -- Mechanical properties, Business, Construction and materials industries
Abstract

ABSTRACT A normal weight porous aggregate (NWPA), with the saturated surface dry density of 2.3 g/[cm.sup.3], was prepared. Impact of NWPA on performance of mortar with water to cementitious materials [...]

Published
2015
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19. Enhanced carbonation reactivity of wollastonite by rapid cooling process: Towards an ultra-low calcium CO2 sequestration binder

Author

Li Zhang, Songhui Liu, Dongxing Xuan, Peiliang Shen, Xuemao Guan, Caijun Shi, and Zhu Jianping

Subjects
Chemistry, Carbonation, Building and Construction, engineering.material, Microstructure, Wollastonite, law.invention, Compressive strength, Chemical engineering, law, engineering, Hardening (metallurgy), General Materials Science, Calcination, Reactivity (chemistry), Dissolution, Civil and Structural Engineering
Abstract

To enhance the carbonation reactivity of wollastonite (CS), three different calcination processes were adopted to synthesis CS with different crystal structures. The effects of the cooling process on the polymorphs, carbonation reactivity, and CO2 sequestration capacity of CS were measured and evaluated, and its carbonation hardening properties and microstructure evolution were also explored. The results indicated that the carbonation reactivity of CS was enhanced by the rapid cooling process due to the inhibition of the polymorphic transition of α-CS to β-CS. The enhanced carbonation reactivity was attributed to the distorted CaOx polyhedra and extended Ca-O distance in α-CS, which made the dissolution of α-CS to leach Ca2+ easier. The CO2 sequestration capacity and compressive strength of highly reactive CS reached 27.2% and 92.3 MPa, respectively, after carbonation for 24 h. Therefore, it was demonstrated that highly reactive CS can be adopted as ultra-low calcium and CO2 sequestration binder.

Published
2021

20. Effects of colloidal nanoBoehmite and nanoSiO2 on fly ash cement hydration

Author

Zhu Jianping, Haibin Yin, Feng Chunhua, Surendra P. Shah, and Zhanying Zhang

Subjects
Cement, Materials science, fungi, technology, industry, and agriculture, Nanoparticle, Building and Construction, Microstructure, complex mixtures, Colloid, Compressive strength, Fly ash, General Materials Science, Composite material, Cement mortar, Civil and Structural Engineering
Abstract

The influences of colloidal nanoBoehmite (CNB) and colloidal nanoSiO 2 (CNS) on fly ash cement mortar hydration and microstructure development of fly ash cement pastes were investigated. The results revealed that fly ash cement hydration was accelerated by CNB and CNS at early age thus enhancing the early age strength of the materials. Although higher content of nanoparticles significantly hindered cement hydration, adding appropriate amount of CNB and CNS benefited the development of compressive strength both at early and later age.

Published
2015

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