Concrete Glass Research Articles

Evaluation of the freeze-thaw resistance of concrete incorporating waste rubber and waste glass

In this paper, a systematic evaluation of the freeze-thaw (F-T) resistance of concrete containing waste rubber (WR) and/or waste glass (WG) was performed. Fine aggregates were replaced separately with crumb rubber (CR), glass powder (GP) and a mixture of both, and substitution rates varied from 0 to 15 % by volume. All mixtures were subjected to 25, 50, 75 and 100 F-T cycles, respectively. After reaching the desired number of F-T cycles, changes in the appearance, mass, dynamic modulus, degree of internal damage, and compressive strength of the degraded mixtures relative to the pre-freeze-thaw (Pre-F-T) condition were observed or measured. Results indicated that compared with plain concrete, rubberized concrete had superior F-T resistance but lower Pre-F-T strength. Although glass concrete may be less impressive than rubberized concrete in F-T resistance, it offered better mechanical strength and a denser microstructure. However, the incorporation of GP failed to mitigate the apparent damage and mass loss of concrete in F-T environments. Besides, the long-term F-T durability of glass concrete may be questioned, as evidenced by a sharp deterioration in nearly all of its parameters during 75–100 F-T cycles. For the combined mixtures, 15 % CR and 10 % GP have been proved to be a reasonable combination for maximizing the F-T resistance of concrete. Finally, scanning electron microscopy (SEM) was employed to reveal the mechanisms of CR and GP action in F-T environments at the microscopic level. In summary, CR and GP are materials worth considering in concrete preparation to improve its F-T resistance.

Математическое моделирование термодинамических процессов в вентиляционных шахтах метрополитена

Objective: To develop recommendations for performing thermal engineering calculations during the ventilation shafts renovation with the creation of internal thermal insulation made of foam glass concrete. Methods: Mathematical modeling by the Metrogiprotrans method of the shaft lining in an elastic medium for specified movements from expanding ice; mathematical modeling by the finite elements method of a system including a ground massive, shaft lining and a load from convection (cold air flow). Results: The criteria for the risk of the ventilation shafts lining destruction during freezing of water-saturated soil behind the lining have been established. It has been established that the destruction of cast-iron lining from the ice expansion depends on the amount of soil resistance and the size of voids behind the lining, but not on the depth of the location of the section under consideration. An influence assessment of the soil thermodynamic characteristics during the ventilation shafts operation in conditions of alternating temperatures has been performed. It was found that as a result of a very wide change in the thermal characteristics of the medium, the temperature behind the lining during thermodynamic calculations changes insignificantly — within 1 °C, and the thermal characteristics of the foam glass concrete layer play a decisive role in heat distribution. Practical importance: The results of the study can be used during the inspection of subway ventilation shafts, as well as an algorithm for conducting thermodynamic calculations for projecting shafts renovation with an insulation made of foam glass concrete.

Recycled glass concrete with cementitious materials: Study of mechanical prediction model and dry shrinkage mechanism

Recycled Glass Concrete (RGC) exhibits low mechanical strength due to the loose structure of its interfacial transition zone. Adding supplementary cementitious materials is an effective approach to address the issues of low mechanical performance and durability in RGC. In order to improve the performance of recycled glass concrete, three series of tests were prepared for mechanical testing, drying shrinkage testing and microstructure analysis: single-doped limestone powder (RGC-L), single-doped metakaolin (RGC-M), and limestone-metakaolin mix (RGC-LM). The mechanical results demonstrate that RGC, with the addition of 5 % limestone powder and 5 % metakaolin, exhibits optimal strength improvement. Specifically, compressive strength increased by 23.3 %, splitting tensile strength by 38.1 %, and flexural strength by 7.3 %. Additionally, a mechanical prediction model for RGC was proposed, yielding relational equations for splitting tensile strength (ft), flexural strength (fr), and compressive strength (fc): ft=0.14fc0.93,fr=0.72fc0.56. The drying shrinkage results indicate that RGC containing 10 % limestone powder and 20 % metakaolin exhibits the best performance, with a 32.5 % reduction in shrinkage rate. Microstructural analysis revealed that the reaction between Al₂O₃ in metakaolin and limestone powder produces CO₃-AFm, which results in a denser structure in the interfacial transition zone of the recycled glass concrete. Ultimately, this study elucidates the micro-mechanisms and drying shrinkage mechanisms of limestone powder and metakaolin in RGC, offering a promising approach for the effective utilization of construction waste.

Evaluation of the Effect of the Composition of the Foam Glass Concrete on Its Flammability and Moisture Characteristics

The purpose of this study was to evaluate the moisture and flammability characteristics of lightweight concrete with different aggregates and different amounts of cement according to different criteria. The moisture properties of the specimens were evaluated by the coefficient of water absorption due to capillary action, short-term water absorption, and water vapour permeability. Short-term water absorption correlated with the density of the specimens, and capillary absorption was evaluated depending on the soaking time, amount of cement, and type of lightweight aggregate. The values of the water vapour diffusion resistance factor were estimated based on the amount of cement, the type of lightweight aggregate, the density, and the porosity. The porosity correlated with the amount of cement and the type of lightweight aggregate. The flammability properties of concrete with lightweight aggregate were evaluated by several methods, such as the single flame source test, the single burning item test, and the non-combustibility test. After assessing the flammability characteristics, a structure analysis of the samples was specifically performed to assess the processes that occur during the combustion of lightweight concrete. It was found that short-term water absorption depended mainly on the density, capillary absorption on the amount of cement, and the water vapour diffusion resistance factor, flammability, and thermal stability of lightweight concrete on the type of granules.

Improvement in Long Term Bonding and Mechanical Performance by Using Glass Concrete in Combination with Xanthan Gum Exposed to Harsh Environment

Abstract Concrete is the mostly used construction material composed of a mixture of cement, water, aggregates (such as sand, gravel, or crushed stone), and often additional additives or admixtures. It is widely used in the construction industry for various applications due to its strength, durability, and versatility. Key characteristics of concrete include strength, durability, versatility, fire resistant, cost effective, weather resistant, insulation and decorative options. Concrete plays a vital role in the construction industry, providing the foundation for most buildings, infrastructure, and many other structures worldwide. Its composition and properties can be tailored to meet specific project requirements, making it an indispensable material in modern construction. Various fibers can be used to enhance the mechanical and bonding properties of concrete. Also waste fibers after recycling can be reduced the environmental burden. Keeping in this view, glass powder sodium silicate glass (SSG) is used as replacement of cement with different percentages 0%,4%,8%, and 12% in combination of xanthan gum 0.2% for all mixes. An experimental study is conducted to investigate the mechanical and durability properties of concrete by performing compression test, flexural test, alkali silica reactivity test, sulfate resistivity test and drying shrinkage test. For this, forty-eight concrete cylinders are prepared for compression test, forty-eight concrete prisms for flexural test and thirty-six mortar bars of four mixes are prepared for durability testing. Workability is checked of fresh concrete during the pouring of concrete cylinders. Poured cylinders’ samples are left for 7, 14, 21 and 28 days of curing. Different tests are performed on hardened concrete and mortar samples to evaluate the mechanical and durability properties. Results concluded that workability of four mixes lies between 60-80mm and compressive strength of concrete has been improved using glass powder (SSG). Optimum results have been achieved at 12% as compared to other mixes 4% and 8% of concrete samples. Fibrous material is used as a binding agent and fibrous concrete is suitable for humid environment where high strength and voids less concrete are required. Quantity of cement can be reduced by using different fibers as a replacement of cement. Research recommended that recycled glass powder can be used in concrete as construction material and 12% replacement is suitable for optimum results.

Modeling and Experimental Study of Packing Density of Foam Glass Concrete

The paper deals with the process of production and properties of foam glass concrete – a composite material consisting of modified gypsum binder and granulated foam glass as an aggregate. Foam glass concrete has high strength, durability, environmental friendliness and low thermal conductivity, which makes it a promising material for wall structures. Optimal packing densities were obtained by using programs developed by the authors in the Python programming language to calculate the optimal diameters of three fractions of granular foam glass in an orthogonal or hexagonal packing model. The compressive and flexural strength and thermal conductivity coefficient were investigated on samples of different compositions. The value of the thermal conductivity coefficient of the foam glass concrete was reduced due to the air-entraining additive. In conclusion, the optimum composition of foam glass concrete was proposed taking into account all investigated parameters.

Experimental Study on Long-Term Mechanical Properties and Durability of Waste Glass Added to OPC Concrete.

This study aims to achieve the sustainable utilization of waste glass resources through an investigation into the influence of three types of admixtures, namely waste glass powder (WGP) (G), waste glass powder-slag (G-S), and waste glass powder-fly ash (G-F), on the mechanical properties and durability performance of waste glass concrete. The experimental results demonstrate that the exclusive use of WGP as an admixture led to the relatively poor early compressive strength of the concrete, which decreased with an increase in dosage. However, at medium to long curing ages, the strength of the waste glass concrete could equal or even surpass that of ordinary concrete. When dual admixtures were employed, the G-S group exhibited higher compressive strength compared to the G-F group. Specifically, within the G-S group, a glass powder dosage of 15% yielded higher compressive strength, and after 180 days, the dual admixture groups exhibited greater strength than ordinary concrete (G0); the compressive strength of the tG1S1 group was 44.57 MPa, and that of the G0 group was 40.07 MPa. The chloride ion diffusion coefficient showed a varying trend with an increase in WGP dosage, initially decreasing and then increasing. The concrete's resistance to erosion was maximized when the glass powder dosage reached 30%. As the WGP dosage increased, the overall frost resistance decreased. For a total dosage of 30%, the optimal glass powder dosage in both G-S and G-F groups was found to be 15%.

High-Strength Building Material Based on a Glass Concrete Binder Obtained by Mechanical Activation

As part of the work, the chemical interaction of finely ground glass (~1 μm), calcium oxide, and water was studied. It is shown that an increase in the fineness of grinding makes it possible to abandon autoclave hardening in the production of products on a hydrosilicate binder. The study of chemical interaction was carried out by calculating the thermodynamic equilibrium and was also confirmed by XRD analysis. DTA analysis showed that an increase in the treatment temperature leads to an increase in the proportion of the reacted phase at the first stage. Subsequently, phase formation is associated with the presence of CaO. The carrier of strength characteristics is the CaO×2SiO2×2H2O phase. The selection and optimization of the composition make it possible to obtain a high-strength glass concrete material with a strength of about 110 MPa. The micrographs of the obtained samples correspond to classical hydrosilicate systems.

Effect of recycled of recycled glass aggregates on mechanical and physical properties of structural concrete

The exponential expansion in concrete use has put the environment under immense pressure to supply cement, aggregates, and water. Natural resource consumption impacts the environment and undermines the concrete industry. A swift shift towards sustainable concrete is required considering the emergency triggered by human activity on the climate. Glass concrete (GC) has sparked the curiosity of the construction industry owing to its environmentally friendly approach. The study uses recycled glass aggregates (RGA) to partially replace natural aggregates (NA) to produce sustainable structural concrete with superior mechanical properties. 20% glass concrete outperformed all others in fresh and hardened concrete. Only 75% glass blend demonstrated a slight decrease in compressive strength due to drop in density. Glass concrete showed a lower water absorption capacity. However, glass has triggered an alkali-silica (ASR) reaction, reducing the durability of the concrete significantly.

Environmental assessment of recycled glass aggregates in reinforced concrete

The sustainability of the concrete industry is in jeopardy due to the use of natural resources which impacts the environment. A swift shift towards sustainable thinking is required considering the emergency triggered by human activity on the climate. Glass concrete (GC) has sparked curiosity of the construction industry owing to its environmentally friendly approach. This article examines the environmental implications of partially replacing natural aggregates in concrete with recycled glass aggregate at various percentages i.e. 10%, 25%, 50%, and 75% which is then compared to controlled concrete specimen (CC). The assessment indicated 287 kgCO2Eq were generated for control concrete (CC), whereas concrete with 20% glass aggregate (GA) resulted in 258 kgCO2Eq. global warming potential. Likewise, M25 concrete was reported to have 1.68 kgCFC-11Eq compared to 1.85 kgCFC-11Eq for natural aggregate concrete. Even though glass concrete demonstrates lower values in several environmental effects, there is need for improvement in impact categories including acidification and respiratory organics.

ENVIRONMENTAL ASPECTS OF THE USE OF BATTLE GLASS FOR THE PRODUCTION OF GLASS CONCRETE

The technology of glass concrete based on dispersed container and sheet glass has been developed. It is shown that when Portland cement and cullet are ground together, when a specific surface area of 5890 – 6450 cm2/g and a particle size of 3.4 – 3.6 microns with a dispersed glass content in the composite of 20 – 50 wt. % with hyperplasticizer glass concrete corresponds to class B30 – B40, which meets the requirements of regulatory documents. The microstructure of glass concrete and the features of its dehydration when heated to 1000 °C investigated. Using X-ray phase analysis, it was found that sodium-calcium hydroaluminosilicates such as gmelenite and thomsonite are formed in glass concrete.

Effect of rice husk ash as partial replacement of ordinary Portland cement in ultra-high-performance glass concrete

Ultra-high-performance concrete (UHPC) is a high-tech concrete whose excellent mechanical and durability characteristics are ascribed to the homogeneity and high packing density of its matrix. However, due to the high contents of cement and silica fume usually necessaries for achieving this packing density, UHPC's final cost and carbon-footprint are far higher than standard concretes. Therefore, over the last few years, the spotlight of UHPC’s research has focused sharply on the analysis of locally available supplementary cementitious materials as partial replacement of cement and silica fume. This article presents an investigation to analyze the effect of rice husk ash (RHA) as partial substitution of cement in a previously optimized mixture of recycled-glass-UHPC by means of several statistical tools. Cementitious materials employed in this research involved silica fume, limestone powder, recycled glass powder and ordinary Portland cement (OPC). Based on the results, it can be concluded that RHA addition in the optimized glass UPHC yields to a significant decrease in the workability of concrete and a slight decrease of compressive strength. Results also demonstrated the high interaction between the RHA and water contents, which could be ascribed to the water absorption and internal curing provided by RHA particles.

Effective management of waste glass: Application in the production of eco-friendly concrete

Aggregates are one of the main components of concrete as they give volumetric stability to concrete structures. However, consuming natural aggregates dramatically impacts the environment destroying the ecosystem. Thus, it is crucial to find secondary resources that can provide an acceptable performance level as natural aggregates. Many countries, especially in Asia, have limited for natural aggregates; hence, making natural aggregate expensive. Therefore, recycling waste materials with the potential to be used as aggregates would mitigate this challenge thereby reducing the impact on the environment. Hence, researchers worldwide are replacing various kinds of waste materials with partial or complete replacements for the natural aggregates in concrete. In this research work, recycle waste glass aggregates are used to partly substitute natural fine and coarse aggregates in producing eco-friendly concrete. In this regard, 5–20% of recycled glass aggregates were used to replace natural aggregates in concrete. Concrete slump test, mechanical properties such as compressive and split tensile strength tests are conducted on eight concrete mixes. As the percentages of aggregates increased due to the angular shape of fine glass aggregates, it decreases the slump value of concrete. Nevertheless, from the results, it is stipulated that recycling of waste glass aggregates can be an alternative to natural aggregates for concrete if used properly. Successful uses of these aggregates can save the environment and waste disposal costs and significantly save the total production cost of concrete as the density of glass concrete is lighter than the concrete made from conventional aggregates.

Experimental Study on Mechanical Properties of Concrete Containing Waste Glass and Its Application on Concrete-Filled Steel Tubular Columns

Waste glass (WG), as a nonbiodegradable material, poses a threat to environmental protection. The reuse of WG as a raw material to replace cement or aggregate in concrete production is gaining attention for recycling purposes. However, the optimal proportion of WG in concrete mixtures and its particle size distribution are hard to determine. Large glass particles are prone to leading to the undesirable alkali–silica reaction (ASR) in concrete. Therefore, in this study, cement and aggregate in concrete mixtures are partially replaced by combinations of glass powder (<30 μm) and glass beads (0.2–1.7 mm), respectively. Glass concretes (GCs) containing waste glass at various replacement ratios (0, 10, 15, 20, and 30%) are prepared, and their flowability and compressive strength are evaluated and compared. Finally, steel tubes filled by ordinary concrete (OCFSTs) and steel tubes filled by glass concrete (GCFSTs) are fabricated and tested in axial compression. The test results show that the slump and slump flow increase when the replacement ratio is lower than 20%, and the maximum slump value (250 mm) is achieved for concrete with the use of 20% waste glass. With regard to compressive strength, as the glass replacement percentage is increased, the compressive strength of GC continues to reduce. The maximum decrease of compressive strength (merely 70% of compressive strength for original concrete) is observed in GC mixed with 20% glass, which might be attributed to the smooth surface of glass, consequently weakening the interfacial bond strength between the glass and matrix. In terms of the bearing capacity of GCFSTs, the axial compressive strength of GCFSTs decreases as more GC is used. However, no obvious reduction is observed compared to OCFSTs (less than 10% for GCFSTs containing 30% GP). Moreover, GCFSTs show greater (no less than 25% more) deformational ability at peak strength over OCFST columns, demonstrating that GC is a promising alternative for normal concrete. Finally, the feasibility of existing design codes (AISC, EC4, and GB50936-2014) to assess the bearing capacity of GCFSTs is evaluated by comparing the test and calculated results. The current codes, in general, give a conservative prediction and EC4 provides the closest value (predicted to experimental peak load ratio is 0.9).

Use of Ground Glass Waste as Aggregate Filler in Concrete

The disposal of the huge volume of glass waste is one of the significant environmental issues that need to be addressed. One of the efficient ways to solve this problem is to incorporate ground glass waste in concrete mixtures. However, its inherent surface smoothness and microcracks within the glass particle harm the hardened properties of concrete. Minimizing the particle size and controlling the amount of cement in the mixture can reduce the adverse effect of using glass in concrete. This study utilized ground glass waste (850 μm) as aggregate filler in a concrete mix. More specifically, this study investigated the effect of paste volume (Vp) on the properties of fresh and hardened concrete with ground glass waste as aggregate filler. Based on the test results, ground glass waste as aggregate filler negatively affects the workability of fresh concrete, but increasing the amount of paste can mitigate it. Vp values in terms of void volume (Vv) in the aggregates of 1.6Vv and 1.8Vv achieved satisfactory consistency of fresh concrete. In addition, the concrete compressive strength increased when increasing Vp. The test results have shown that ground glass waste has the potential to be utilized as aggregate filler in concrete mixtures.

Service properties of porous liquid glass concrete

The article presents studies’ results of cementless lightweight concretes based on porous granular aggregate. Lightweight concrete components are specially synthesized from mixtures containing liquid sodium glass and thermal energy waste with various fineness. Thermal hardening of a matrix based on liquid glass and technogenic fillers at a temperature of 350ºС provided heat-insulating concrete with 480 kg/m3density and compressive strength of 4.7 MPa. The aim of the work is to study operational stability of lightweight concrete from genetically related components. Durability of lightweight concrete was evaluated in terms of hydro physical properties, resistance to frost and salt aggression, and cyclic heating. Methods of physical and mechanical testing of concrete have been used in the work. X-ray phase analysis and electron microscopy were used to study materials’ composition and structure. The results of complex tests showed stability of the structure of liquid glass concrete based on porous aggregate to the impact of operational factors. The lightweight concretes developed are characterized by a softening coefficient of 0.81; they withstood 50 cycles of alternating freezing and thawing, 20 cycles of cyclic exposure at a temperature of 1050ºС and 20 thermal cycles at a temperature of 250ºС; staying in aggressive sulfate and chloride magnesium solutions.

Bond strength of granulated foam glass with binder in foam glass concrete

Bond strength of granulated foam glass with binder in foam glass concrete

Heat exchange modeling between the air flow and the metro ventilation shaft lining in the conditions of St. Petersburg, Russia

Icing of the injection layer in underground tunnels and ventilation shafts leads to wear, destruction of supporting structures and flooding. In St. Petersburg the air temperature in winter can drop to -25 ° C, what can lead to these phenomena in the subway facilities. The article presents the modeling results of a viscous three-dimensional air flow, heat and mass transfer of a metro ventilation shaft in the Ansys CFX program. A numerical model of the ventilation shaft and the surrounding soil consisting of five layers has been developed: air; foam glass concrete; prefabricated cast-iron tubing lining; injection layer; soil massif. The parameters of the computational grid and the boundary conditions of the problem are specified. Two models of the ventilation shaft with an axial length of 1 m and 10 m were built. Temperature plots are constructed for three tasks, where the injection layer consists of water, wet clay soil and average between water and wet clay soil. The choice of overall thermal and technical characteristics of the thermal insulation material during the reconstruction of the existing ventilation shafts in three different sealing space conditions is confirmed.

Study on the possibility to use waste glass in concrete

Million tons of waste glass are produced worldwide every year, which creates waste that does not dissolve in the soil and does not decompose in the environment. The composition of glass contains silicon oxide, so it is fully justified to use it as a building material. It is possible to contribute to the development of environmentally friendly, energy efficient and green technologies by finely grinding glass waste and using i in concrete as a partial replacement of cement weight.
 In this study, mix the grade B25 concrete with PC 42.5 Portland cement, colorless and colored waste glass powder, fine and large aggregate were used. This research deals with studying the effect of adding waste glass powder (5-25%) to cement mortar on mechanical properties of concrete. The chemical composition of colorless and colored was determined using the XRF analysis method. A set of tests, including unconfined compressive strength tests, were conducted on samples prepared at curing times of 7, 14, 28, 56, 90 and 180 days.
 The results showed that cement replacement for waste glass up to 20% produced lower compressive strength than that of the control sample at 28 days. But also, it will be increase after 90 days. The micro-silica in the glass product reacts secondary to the calcium oxide hydro silicate compound formed from the cement hydration process to form calcium hydro silicate. Main hydroxyl ions and alkali ions penetrate the surface of micro silica, reducing the amount of free water and increasing the strength of concrete.
 Хаягдал шилийг бетонд ашиглах боломжийн судалгаа
 Хураангуй: Дэлхийн хэмжээнд жил бүр хэдэн сая тонн шилний хаягдал гарч байгаа бөгөөд энэ нь газрын хөрсөнд уусаж шингэдэггүй, байгаль орчинд задардаггүй хог хаягдлыг үүсгэдэг байна. Шилний найрлагад цахиурын исэл агуулагдсан байдаг тул түүнийг барилгын материалд ашиглах бүрэн үндэслэлтэй. Шилний хаягдлыг нарийн нунтаглаж, цементийн жингийн тодорхой хувьд орлуулан бетонд ашигласнаар байгаль орчинд ээлтэй, эрчим хүчний хэмнэлттэй, ногоон технологийн хөгжилд хувь нэмэр оруулах боломжтой юм. Судалгааны ажилд МАК-ийн портландцемент (ОРС), цементийн жингийн тодорхой хувьд орлуулах зорилгоор өнгөгүй болон өнгөтэй хаягдал шилний нунтаг, том дүүргэгчээр Орхон аймаг дахь “Дэлт хошуу” ордоос ОТК ХХК-ний үйлдвэрлэсэн 5-10, 10-20мм-ийн ширхэглэлтэй буталсан дайрга, нарийн дүүргэгчээр Дархан “Салхит”-ийн карьерийн /0-5мм/ элсийг сонгон авч В25 ангийн бетон зуурч, бетон сорьцын шахалтын бат бэхийг туршсан болно. Өнгөгүй ба өнгөтэй шилний химийн найрлагыг ХRF анализын аргыг ашиглан тодорхойлов. Туршилтын дүнд цементийн жингийн 20% хүртэл нунтаг шилийг орлуулахад хяналтын бетон сорьцтой харьцуулахад удаан бэхжилттэй болох нь батлагдав. Тухайлбал: 90 хоногийн дараагаас эхлэн 20% хүртэлх бүх найрлагын шахалтын бат бэхийн утга нь төслийн утгадаа хүрэх ба 180 хоног дээр 20% шил агуулсан бетон сорьцын бат бэх бэх 57.5 МПа-д хүрч байна. Шилний найрлага дахь микро цахиурын исэл нь цементийн зуурмагийн гидратацийн процессийн дүнд үүсч байгаа кальцийн ислийн гидраттай харилцан үйлчлэлцэж кальцийн гидросиликат нэгдлүүдийн хоёрдогч гелийг үүсгэнэ. Түүнчлэн гидроксиль ионууд болон шүлтийн ионууд микроцахиурын гадаргууд нэвчиж, чөлөөт усны хэмжээ багасаж, бүтэц нягтрах боломжийг бий болгодог учраас бат бэх нэмэгддэг байна.
 Түлхүүр үг: цахиур, бат бэх, тогтвортой хөгжил, барьцалдах материал

Flexural Capacity of Fire-Affected Concrete Members with Recycled Glass Aggregate and Glass Pozzolan

Adding recycled glass components to concrete mixes is a novel and sustainable option. Prior studies have recommended replacement ratios of 30% glass aggregates and 20% ground glass pozzolan as optimum substitutions in concrete mixes. The compressive strength of glass concrete has been shown to increase when glass components are used with these proportions. Less information is available on the flexural strength of such concrete, and no previous research has been conducted on the flexural capacity of glass concrete exposed to high temperatures. To bridge this knowledge gap, cured concrete cylinders and beam samples using various glass coarse aggregate and ground glass pozzolan replacement ratios were heat-treated in a furnace. The heat-affected samples were then tested for their compressive and flexural capacities. It was found that glass pozzolan increased the mix workability, while glass aggregates reduced it. The compressive strengths were modesty increased and the flexural capacities were drastically reduced (up to 93%) after heat exposure. Therefore, recycled sustainable glass concrete may be efficiently used in concrete compressive members and in properly designed flexural members. It can also be used efficiently in architectural non-load-bearing members for insulating and aesthetic effects.