Microstructure and durability performance of sustainable cementitious composites containing high-volume regenerative biosilica

2022 ◽  
Vol 178 ◽  
pp. 106038
Author(s):  
Jiaqi Li ◽  
Qingxu Jin ◽  
Wenxin Zhang ◽  
Chen Li ◽  
Paulo J.M. Monteiro
Keyword(s):  
High Volume ◽  
Cementitious Composites ◽  
Durability Performance

scholarly journals High-Volume Fly Ash-Based Cementitious Composites as Sustainable Materials: An Overview of Recent Advances

2021 ◽  
Vol 2021 ◽  
pp. 1-22
Author(s):  
Sen Du ◽  
Qingxin Zhao ◽  
Xianming Shi
Keyword(s):  
Fly Ash ◽  
High Volume ◽  
Cycle Performance ◽  
Cementitious Composites ◽  
Research Needs ◽  
Fresh Properties ◽  
High Volume Fly Ash ◽  
Sustainable Materials ◽  
Durability Performance ◽  
Lower Carbon

High-volume fly ash (HVFA) cementitious composites (paste, grout, mortar, and concrete) have been widely investigated as a class of sustainable materials due to their lower carbon footprint and often better life cycle performance than conventional Portland cement mixtures. Recent years have seen increased research in HVFA-based materials, and the potential of this type of mixtures in engineering applications has significantly improved. In this context, this work reviews the renewed knowledge of HVFA mixtures, focusing on the relevant papers published over the last decade. The effects of replacing cement with a HVFA binder on the fresh properties, mechanical properties, durability performance, and environmental impact of HVFA cementitious composites are explored. Measures that can compensate for the main drawbacks that limit the wider application of HVFA mixtures are discussed in detail. At last, we summarize the research needs and remaining challenges of HVFA cementitious composites.

scholarly journals Effects of Sulfate and Sulfuric Acid on Efficiency of Geopolymers as Concrete Repair Materials

Gels ◽  
2022 ◽  
Vol 8 (1) ◽  
pp. 53
Author(s):  
Rayed Alyousef ◽  
Ahmed Abdel Khalek Ebid ◽  
Ghasan Fahim Huseien ◽  
Hossein Mohammadhosseini ◽  
Hisham Alabduljabbar ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Bond Strength ◽  
High Performance ◽  
Mechanical Performance ◽  
High Volume ◽  
Industrial Wastes ◽  
Ternary Blend ◽  
Ceramic Tiles ◽  
Strength Performance ◽  
Durability Performance

Various geopolymer mortars (GPMs) as concrete repairing materials have become effective owing to their eco-friendly properties. Geopolymer binders designed from agricultural and industrial wastes display interesting and useful mechanical performance. Based on this fact, this research (experimental) focuses on the feasibility of achieving a new GPM with improved mechanical properties and enhanced durability performance against the aggressive sulfuric acid and sulfate attacks. This new ternary blend of GPMs can be achieved by combining waste ceramic tiles (WCT), fly ash (FA) and ground blast furnace slag (GBFS) with appropriate proportions. These GPMs were designed from a high volume of WCT, FA, and GBFS to repair the damaged concretes existing in the construction sectors. Flexural strength, slant shear bond strength, and compatibility of the obtained GPMs were compared with the base or normal concrete (NC) before and after exposure to the aggressive environments. Tests including flexural four-point loading and thermal expansion coefficient were performed. These GPMs were prepared using a low concentration of alkaline activator solution with increasing levels of GBFS and FA replaced by WCT. The results showed that substitution of GBFS and FA by WCT in the GPMs could enhance their bond strength, mechanical characteristics, and durability performance when exposed to aggressive environments. In addition, with the increase in WCT contents from 50 to 70%, the bond strength performance of the GPMs was considerably enhanced under sulfuric acid and sulfate attack. The achieved GPMs were shown to be highly compatible with the concrete substrate and excellent binders for various civil engineering construction applications. It is affirmed that the proposed GPMs can efficiently be used as high-performance materials to repair damaged concrete surfaces.

scholarly journals Mechanical behaviour and durability of high volume fly ash cementitious composites

2016 ◽  
Vol 10 (38) ◽  
pp. 305-318
Author(s):  
Usman Haider ◽  
Zdenek Bittnar ◽  
Lubomír Kopecky ◽  
Petr Bittnar ◽  
Jiri Nemecek ◽  
...  
Keyword(s):  
Fly Ash ◽  
Mechanical Behaviour ◽  
High Volume ◽  
Cementitious Composites ◽  
High Volume Fly Ash

Mechanical and durability performance of FRP confined and unconfined strain hardening cementitious composites exposed to sulfate attack

2019 ◽  
Vol 207 ◽  
pp. 158-173 ◽  
Author(s):  
Alaa Mohammedameen ◽  
Mehmet Eren Gülşan ◽  
Radhwan Alzeebaree ◽  
Abdulkadir Çevik ◽  
Anıl Niş
Keyword(s):  
Strain Hardening ◽  
Sulfate Attack ◽  
Cementitious Composites ◽  
Durability Performance
Sign in / Sign up

Export Citation Format

Share Document