Reuse of Heat Resistant Glass Cullet in Cement Composites Subjected to Thermal Load

Abstract

The article describes the possibility of using waste glass cullet as an alternative aggregate for the production of cement composites. Three concrete mixes based on Portland cement CEM I 42.5 R with different contents of recyclate were designed. Borosilicate glass cullet was introduced into the batch by reducing the content of natural aggregate by 0%, 2.5% and 7.5%. Apparent density, water absorption and compressive strength at elevated temperature were measured. The temperature distribution, in cubic samples, was followed by thermocouples. The elements were heated in a special furnace at the temperatures of 200 °C, 400 °C, 600 °C and 800 °C. The composite topography and phase composition were observed using X-ray energy scattering electron microscopy. The results show that the appropriate modification of the cement composite with 2.5% heat-resistant glass cullet improves both the thermal and mechanical properties. Compressive strength reaches an average value of 48.6 MPa after 28 days. The increase in temperature weakens the structure of the composite. It was found that the obtained cement composite has good physico–chemical properties. The research results are presented in the article.

Cement Mortars with Addition of Fly Ash from Thermal Transformation of Sewage Sludge and Zeolite

“…At a temperature of 500-550 • C decomposes to Ca(OH) 2 . The decomposition of CSH phases occur gradually and is related to the discharge of water, while the final degree of decomposition occurs at a temperature of about 750 • C [45][46][47].…”

“…The addition of ash slows down the cement hydration process. Cement containing an increased amount of soluble phosphate compounds binds slower [46,53].…”

Glass Cullet as Additive to New Sustainable Composites Based on Alumina Binder

“…The study is a continuation of works commenced in articles [30][31][32], related to the re-use of glass waste. Given the obtained strength parameters and taking into account the necessity of waste management, glass recycling is a feasible solution in the production of mortar and concrete.…”

“…Numerous studies [6][7][8][9][10][11][12][13][14][15][16][17][18] have proven the suitability of using recycled materials in the production process of ceramics, binders, mortar, concrete, plaster, bituminous materials, etc. In the testing, use is being made of various types of cullet, including car glazing [19], soda-lime glass from containers [20][21][22], glass from technological lines of the pharmaceutical industry [23][24][25], cathode ray tubes for TV sets and computer screens [26,27], float glass from window glazing [28], glass from fluorescent lamps [29], glass from heat resistant dishes [30][31][32] and mirrors, safety glass, crystal glass, and colourless, green, and brown packaging glass [33][34][35][36][37]. Studies are underway in regards to the usage of concrete rubble [38] for the production of "green concrete".…”

Characteristics of Particles Emitted from Waste Fires—A Construction Materials Case Study

“…Waste disposal is an emerging problem in developed [ 1 ] as well as developing [ 2 ] countries. Even though many efforts have been made to limit waste production, the effects remain limited [ 3 ] Although many types of waste can be recycled and successfully used in different applications [ 4 ], recycled materials are often more expensive and hence less attractive for the industry than raw materials [ 5 , 6 ]. However, one of the most popular methods of waste treatment is landfilling [ 7 ], which has a negative effect on the environment [ 8 ].…”