Recycling Glass Cullet from Waste CRTs for the Production of High Strength Mortars

Abstract

The present paper reports on the results of some experiments dealing with the recycling of mixed cathode ray tube (CRT) glass waste in the production of high-strength mortars. Waste CRT glass cullet was previously milled, and sieved, and the only fine fraction was added to the fresh mortar in order to replace part of the natural aggregate. The addition of superplasticizer was also investigated. All hydrated materials displayed high compressive strength after curing. Samples containing CRT mixed glass showed a more rapid increase of strength with respect to the reference compositions, and materials with a superplasticizer content of 1% showed the best overall performance due to the favourable influence of the small glass particles which increase the amount of silicate hydrated produced. The induced coupled plasma (ICP) analysis made on the solutions, obtained from the leaching tests, confirmed the low elution of hazardous elements from the monolithic materials produced and consequently their possible environmental compatibility.

Research on Strength, Alkali-Silica Reaction and Abrasion Resistance of Concrete with Cathode Ray Tube Glass Sand

“…The use of 15 and 20% CRTS decreased the compressive strength in concrete over the first 28 days in Figure 3. The study by Maschio et al (2013) presents a similar relationship [39]. After 28 days, the rate of increase of strength was faster than that of P and specimens with 5 and 10% glass aggregate and approached these values for 15 and 20% CRTS in concrete [8].…”

Recycled cathode ray tube and liquid crystal display glass as fine aggregate replacement in cementitious materials

“…The enhancement in the strength increases as the CRT glass sand content increases. Maschio et al [38] have partially replaced the natural sand (size 4.75 mm) in mortars with CRT glass (size <75 lm) at levels of 0%, 5%, 10% and 20%, by weight. Without adding superplasticizer, the results show an enhancement in the compressive strength at later ages with the inclusion of 10% CRT glass sand, whilst each of 5% and 20% CRT glass sand reduces it.…”

Study of (Pb, Ba) - CRT glass waste behavior as a partial aggregate replacement in cement mortars

“…The improved behaviour could be explained by the glass's low water absorption that facilitates workability, and reduces drying shrinkage. Maschio [23] supports the fact that mortar samples prepared with glass prove a more rapid increase of strength as compared to the control mortar in long-term ageing.…”