Compressive behaviours, splitting properties, and workability of lightweight cement concrete: The role of fibres

2022 ◽  
Vol 320 ◽  
pp. 126237
Author(s):  
Baifa Zhang ◽  
Yuan Feng ◽  
Jianhe Xie ◽  
Jianhua He ◽  
Ting Yu ◽  
...  
Keyword(s):  
Cement Concrete

The Study of Cement Concrete with Improved Properties Based on the Use of Astivated Silica Fume

2020 ◽  
Vol 992 ◽  
pp. 228-232
Author(s):  
E. Tkach ◽  
V. Soloviev ◽  
R. Temirkanov ◽  
Denis B. Solovev
Keyword(s):  
Large Scale ◽  
Positive Influence ◽  
Cement Stone ◽  
Chemical Characteristics ◽  
Structure Modification ◽  
Cement Concrete ◽  
Modification Process ◽  
Physico Chemical ◽  
Scale Levels

In this research the questions of microsilica usage and ways of its activation for modification of structure of cement stone and cement on its basis. The actual questions corresponding any type of filler, particularly microsilica are: how and how much should be put, which mechanisms are involving to process of structuring, how much is received result of structure modification and others. Therefore the role of microdispersed fillers in modification process of cement rock and cement on its basis must be viewed in connection with other dimensional inclusions on different large-scale levels. Reducing of concrete consumption by its substitution by microsilica, has a positive influence to physico-chemical characteristics of concrete.

scholarly journals Role of sequestration of CO2 due to the carbonation in total CO2 emission balance in concrete life

2021 ◽  
Vol 2 (3) ◽  
Author(s):  
Piotr P. Woyciechowski ◽  
Keyword(s):  
Carbon Footprint ◽  
Secondary Phase ◽  
Cement Concrete ◽  
Concrete Carbonation ◽  
Complex Process ◽  
Sequestration Potential ◽  
Concrete Production ◽  
Co2 Balance ◽  
Construction Works

Calculation of the carbon footprint of cement concrete is a complex process including consideration of the phase of primary life (components and concrete production processes, transportation, construction works, maintenance of concrete structures) and secondary life, including demolition and recycling. Taking into consideration the effect of concrete carbonation can lead to a reduction in the calculated carbon footprint of concrete. In this paper, an example of CO2 balance for small bridge elements made of Portland cement reinforced concrete was done. The results include the effect of carbonation of concrete in a structure and of concrete rubble after demolition. It was shown that important impact of carbonation on the balance is possible only when rubble carbonation is possible. It was related to the fact that only the sequestration potential in the secondary phase of concrete life has significant value.

Role of ITZ in the Degradation Process of Blended Cement Concrete under Magnesium Sulfate Attack

2020 ◽  
Vol 32 (9) ◽  
pp. 04020235
Author(s):  
Kai Wu ◽  
Jiangfeng Long ◽  
Hao Han ◽  
Linglin Xu ◽  
Huisheng Shi ◽  
...  
Keyword(s):  
Magnesium Sulfate ◽  
Blended Cement ◽  
Degradation Process ◽  
Sulfate Attack ◽  
Cement Concrete

Role of an Amorphous Silica in Portland Cement Concrete

2006 ◽  
Vol 18 (6) ◽  
pp. 747-753 ◽  
Author(s):  
Amitava Roy ◽  
Nicholas Moelders ◽  
Paul J. Schilling ◽  
Roger K. Seals
Keyword(s):  
Portland Cement ◽  
Amorphous Silica ◽  
Portland Cement Concrete ◽  
Cement Concrete
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