Recent durability studies on concrete structure

Recent progress in low-carbon binders

Recent Advances in durability of superhydrophobic self-cleaning technology: A critical review

A review on concrete surface treatment Part I: Types and mechanisms

Soil stabilization is a technique to improve the engineering and geotechnical properties of soils such as mechanical strength, permeability, compressibility, durability and plasticity. Much has been learned about soil stabilization techniques and additives over the past century. The state of the practice in stabilization techniques and challenges is presented with a discussion. Moreover, available studies regarding the effects of various types of stabilizing agents on the engineering and geotechnical properties of stabilized soils are reviewed here. These stabilizing agents include both calcium-based and non-calcium-based additives. Eco-friendly additives as alternative materials to conventional stabilizing agents are also discussed in this paper. In addition, the problems associated with the presence of disruptive salts and sulfate as well as the techniques to overcome these problems in soil stabilization projects are reviewed.

Soil and clay stabilization with calcium- and non-calcium-based additives: A state-of-the-art review of challenges, approaches and techniques

The durability of anti-graffiti coatings is of special relevance since, unlike other protective treatments, they are not only affected by environmental factors, but also by often aggressive cleaning procedures. However, little is known about the long-term performance of either permanent or sacrificial coatings. This study explores the durability of two commercial coatings on concrete paving slabs under both natural and artificial ageing tests. The results of this research show that a fluorinated polyurethane and a crystalline micro wax weathered in less than 2000 h in a chamber with UVB radiation and after one year of outdoor exposure in the south of England. The former weathered by getting yellow and dark, and eventually, only under the accelerated ageing test, by losing its adhesion to the concrete slabs, and the latter weathered by getting dark, cracked and by reducing its water repellency under natural conditions. Cleaning efficiency of the protected surfaces from graffiti paints was therefore diminished, particularly when pressurized water spray was used on the polyurethane coated surfaces, since the treatment was partially removed and the concrete surface eroded.

Weathering of Two Anti-Graffiti Protective Coatings on Concrete Paving Slabs

Ettringite decomposition in the presence of barium carbonate

This study explored the effectiveness of tetraethyl orthosilicate (TEOS) as a Portland cement mortar consolidant to verify whether it meets the requirements for use in cultural assets. TEOS was found to raise cement mortar strength, lower its porosity and permeability and occasion minimal alteration in its appearance, an indication of its suitability to conserve heritage mortar works. FTIR and 29Si MAS NMR studies supported the notion that TEOS interacts with the hydrated phases of the cement, portlandite and C–S–H gel. The reaction product between portlandite and TEOS was C–S–H gel and between TEOS and C–S–H gel was a gel with longer chain.

/pdf/interaction-of-teos-with-cementitious-materials-chemical-and-4relaoeaee.pdf

Interaction of TEOS with cementitious materials: Chemical and physical effects

Efficiency and durability of a self-cleaning coating on concrete and stones under both natural and artificial ageing trials

http://digital.csic.es/bitstream/10261/211495/3/CCR%20Ternesite.pdf

Paula María Carmona-Quiroga

Papers

Weathering of Two Anti-Graffiti Protective Coatings on Concrete Paving Slabs

Ettringite decomposition in the presence of barium carbonate

Interaction of TEOS with cementitious materials: Chemical and physical effects

Efficiency and durability of a self-cleaning coating on concrete and stones under both natural and artificial ageing trials

Can calcium aluminates activate ternesite hydration