Nanoparticles for high performance concrete (HPC)

Abstract

According to the 2011 ERMCO statistics, only 11% of the production of ready-mixed concrete relates to the high performance concrete (HPC) target. This percentage has remained unchanged since at least 2001 and appears a strange choice on the part of the construction industry, as HPC offers several advantages over normal-strength concrete, specifi cally those of high strength and durability. It allows for concrete structures requiring less steel reinforcement and offers a longer serviceable life, both of which are crucial issues in the eco-effi ciency of construction materials. Despite the growing importance of nanotechnology, investigations into the incorporation of nanoparticles into concrete are rare (100 out of 10,000 Scopus concrete-related articles published in the last decade). It therefore remains to be seen how research in this area will contribute to concrete eco-effi ciency. This chapter summarizes the state of current knowledge in the fi eld and considers the infl uence of nanoparticles on the mechanical properties of concrete and its durability. It also includes the control of calcium leaching. The problem of effi cient dispersion of nanoparticles is analyzed.

Effect of Nanomaterials on the Properties of Binding Materials in the Construction Industry

“…In recent years, a group of researchers was working on the utility of LC 3 as it is economical and environment friendly. In LC 3 , calcined clay is present, which is a pozzolanic material and forms C-(A)-S-H and AFm phases similar to that of OPC during hydration. In the presence of limestone, C3A reacts to give monocarboaluminate (Mc) and hemicarboaluminate (Hc).…”

“…Portland cement (OPC), a main binding component in concrete, consumes lot of raw materials, energy and emits huge amount of CO2 gas during its production. Concrete, the most important construction materials, is produced at about 27.3 billion tonnes in 2015 [1][2][3][4][5][6][7]. It is expected that OPC production may increase by nearly 200% by 2050 with 6,000 million tonnes [8].…”

“…Out of different construction materials, binders particularly OPC, Geopolymer cement and concretes made from them are very important. In recent years one new cement LC 3 has also emerged. Strength and durability are improved considerably in the presence of NMs.…”

Comparative Analysis of the Use of Nanosilica and Fly Ash in Hydraulic Concrete

“…Therefore, a balance is required to continue building without significant negative effects on the environment. (5) reported that as much as 50 % of reinforced steel use could be reduced by increasing concrete's compressive strength. Durable and high strength concrete is the main concern in future production as far material and eco-efficiencies are concerned.…”