Effect of Glass Powder on Concrete Sustainability

Abstract

As defined by the American Concrete Institute (ACI), alternative supplementary cementitious materials (ASCMs) and local materials are very important in concrete sustainability. As an ASCM, glass powder (GP) shows excellent pozzolanic properties. This paper focuses on characterization and the effect of GP on concrete properties compared to those of Class F fly ash (FFA) and ground granulated blast furnace slag (GGBS). Concrete incorporating 0, 20 and 30% of GP and other concrete mixes containing 30% of FFA or GGBS were cast. The concrete mixes considered in this study have water to binder (w/b) mass ratio ranging from 0.35 to 0.65. The mechanical properties such as compressive strength and durability including chloride ions permeability and chloride ions diffusion are evaluated. The results show that GP develops effects on mechanical properties similar to those of FFA and performs better than GGBS and FFA in terms of permeability reduction. GP reduces dramatically chloride permeability of concrete regardless w/b ratio, favoring an improvement of the concrete durability. Because of the interesting permeability developed by concretes incorporating GP, its use as an ASCM is promising.

Behaviour of green ultra-high-performance concrete beams with corrosion resistant alloy steel (MMFX) bars

“…Recently, many trials have been done to use waste glass as an ultra-fine filler in concrete or as a cementitious material. Grounded glass (finer than 38 μm in its size) can increase concrete strength and durability through its pozzolanic behaviour [9,10]. Besides it can replace cement partially in certain concrete types [11][12][13][14].…”

Ground Glass Pozzolan in Conventional, High, and Ultra-High Performance Concrete

“…typical pozzolanic materials, the G concretes have lower f' c (about 12%) than the control at early age (less than 91 days), but they develop greater f' c than the control (about 18%) at long-term (beyond the 91 days). The low earlyage f' c results from the dilution effect and the slow reactivity of the G. The improvement of the long-term f' c results is due the pozzolanic activity of the G [1,2].…”

Ground Glass Pozzolan in Conventional, High, and Ultra-High Performance Concrete

“…This demonstrates a greater contribution of the G in decreasing the permeability than a simple reduction in the water content or w/b. This important decrease in permeability in the presence of G results from its pozzolanic reaction, which consumes large portlandite crystals to produce additional C-S-H that fills the pores in the microstructure level [3][4][5][6]. It is the refining effect of the pores and the grains, which generates an increased tortuosity of the pores reflecting the decrease of the permeability.…”