Enhancement of Workability of Cement-Poor Concrete by Optimizing Paste Content

Document identifier: oai:DiVA.org:ltu-7661
Access full text here:10.4236/eng.2014.613080
Keyword: Engineering and Technology, Civil Engineering, Infrastructure Engineering, Teknik och teknologier, Samhällsbyggnadsteknik, Infrastrukturteknik, Geotechnical Engineering, Geoteknik, Structural Engineering, Konstruktionsteknik, Soil Mechanics
Publication year: 2014
Relevant Sustainable Development Goals (SDGs):
SDG 11 Sustainable cities and communitiesSDG 9 Industry, innovation and infrastructure
The SDG label(s) above have been assigned by OSDG.ai

Abstract:

This study describes the performance of concrete in fresh state, intended for sealing deep boreholes in the host rock of radioactive repositories. Set of different paste volumes, combinations of water-to-powder ratios and fine aggregate contents have been performed within the frame of this study. The main objective was to search for tendencies, logical connections and phenomena that occur for different combination of materials regarding the fluidity and segregation and mainly the effect from the (paste) or fine aggregate content. It shall be pointed out that this investigation is a suggestion on how concrete can be optimized using two simple test methods based on changing the paste content. The results highlighted the importance of having sufficient amounts of filler and cement paste for separate and carry larger particles, which gives the concrete good workability and fluidity at casting. It was concluded that the slump behaviors can be optimized based on the adjustments of the superplastisizer dosage.

Authors

Mohammed Hatem

Luleå tekniska universitet; Byggkonstruktion och -produktion
Other publications >>

Nadhir Al-Ansari

Luleå tekniska universitet; Geoteknologi
Other publications >>

Sven Knutsson

Luleå tekniska universitet; Geoteknologi
Other publications >>

Record metadata

Click to view metadata