scholarly journals Performance of self-compacting rubberized concrete

2018 ◽  
Vol 149 ◽  
pp. 01070 ◽  
Author(s):  
Bensaci Hamza ◽  
Menadi Belkacem ◽  
Kenai Said ◽  
Yahiaoui Walid
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Partial Substitution ◽  
Fine Aggregate ◽  
Rubberized Concrete ◽  
Rubber Waste ◽  
Waste Tyres ◽  
Hardened State ◽  
Hardened Properties ◽  
And Storage

Used tyre rubber wastes present a serious environmental problem of pollution and storage. The recycling of this waste in the industry of construction could be an appropriate solution to produce an eco-concrete and could contribute to the improvement of some of its properties. This paper aims to study the possibility of using tyre rubber waste as fine aggregate replacement in self-compacting concrete (SCC). Fines rubber particles of 0-2 mm of waste tyres were added SCC mixtures as a partial substitution of the total volume of sand at different percentages (5, 10, 15, 20 and 30%). The influence of fines rubber of used tyres on fresh and hardened properties of the SCC was investigated. The fresh properties of SCC were performed by using slump-flow, T50 flow time, L-box, V-funnel and segregation resistance tests. Characteristics of the hardened state were obtained by compressive strength and thermal conductivity. The experimental results showed that the inclusion of fines rubber in SCC decreases the workability, reduced its passing capacity and increases the possibility of blocking. A decrease in compressive strength is observed with the increase in rubber content. On the other hand, the incorporation of the rubber fines aggregates enhances in a remarkably way the thermal conductivity.

scholarly journals PROPERTIES OF MORTARS CONTAINING TIRE RUBBER WASTE AND EXPANDED POLYSTYRENE (EPS)

2018 ◽  
pp. 219-225 ◽  
Author(s):  
Adriane Pczieczek ◽  
Adilson Schackow ◽  
Carmeane Effting ◽  
Itamar Ribeiro Gomes ◽  
Talita Flores Dias
Keyword(s):  
Compressive Strength ◽  
Specific Gravity ◽  
Water Absorption ◽  
Expanded Polystyrene ◽  
Fine Aggregate ◽  
Tire Rubber ◽  
Air Content ◽  
Rubber Waste ◽  
Hardened State ◽  
Entrained Air

This study aims to evaluate the application of discarded tire rubber waste and Expanded Polystyrene (EPS) in mortar. For mortars fine aggregate was replaced by 10%, 20% and 30% of rubber and, 7.5% and 15% of EPS. We have verified the consistency, density, amount of air and water retentitivity in fresh state. The compressive strength, water absorption, voids ratio and specific gravity have been also tested in hardened state. The application of rubber powder contributed to the increase in entrained air content and in reducing specific gravity, as well as reducing compressive strength at 28 days. The addition of EPS also contributed to the increase of workability, water absorption and voids ratio, and decreased density and compressive strength when compared to the reference mortar. The use of rubber waste and EPS in mortar made the material more lightweight and workable. The mortars mixtures containing 10% rubber and 7.5% EPS showed better results.

scholarly journals Behaviour of Light Weight Brick with the Influence of EPS Beads and Silica Fume

2020 ◽  
Vol 9 (3) ◽  
pp. 862-867
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Water Absorption ◽  
Silica Fume ◽  
Expanded Polystyrene ◽  
Partial Substitution ◽  
Fine Aggregate ◽  
Light Weight ◽  
Literature Study ◽  
Thermal Insulating

The principal reason behind this experimental investigation carried out here is to diminish the dead load of structures with the potential use of light weight bricks. EPS beads and silica fume are light in nature. The investigation work enhanced, with numerous literature study to find out the utilization of Expanded polystyrene(EPS) beads and silica fume in light weight brick can be used in military bases in cold regions due to its low thermal insulating quality. The main objective of this research is to prepare a light weight brick by partial substitution of Cement with silica fume and the replacement of fine aggregate with EPS beads. A total of 70 bricks containing two different sizes of EPS beads say Type A and Type B with different proportions (0%, 7%, 14%, 21%) of each Type were casted in order to check the mechanical properties such as compressive strength, water absorption, efflorescence, workability, and thermal conductivity of the brick. The compressive strength test was carried out at 7, 14 and 28 days of curing. As the percentage of EPS beads in the brick increased the strength of brick decreased while with the increase of EPS beads in the brick the water absorption as well as the thermal conductivity of brick decreased. There were slight presence of Efflorescence in some of the bricks while in most of the brick there were no efflorescence found.

scholarly journals Prediction Models for the Mechanical Properties of Self-Compacting Concrete with Recycled Rubber and Silica Fume

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1821 ◽  
Author(s):  
Robert Bušić ◽  
Mirta Benšić ◽  
Ivana Miličević ◽  
Kristina Strukar
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Silica Fume ◽  
Prediction Models ◽  
Crumb Rubber ◽  
Fine Aggregate ◽  
Rubberized Concrete ◽  
Self Compacting Concrete ◽  
Recycled Rubber ◽  
European Standards

The paper aims to investigate the influence of waste tire rubber and silica fume on the fresh and hardened properties of self-compacting concrete (SCC) and to design multivariate regression models for the prediction of the mechanical properties of self-compacting rubberized concrete (SCRC). For this purpose, 21 concrete mixtures were designed. Crumb rubber derived from end-of-life tires (grain size 0.5–3.5 mm) was replaced fine aggregate by 0%, 5%, 10%, 15%, 20%, 25%, and 30% of total aggregate volume. Silica fume was replaced cement by 0%, 5%, and 10% of the total cement mass. The optimal replacement level of both materials was investigated in relation to the values of the fresh properties and mechanical properties of self-compacting concrete. Tests on fresh and hardened self-compacting concrete were performed according to the relevant European standards. Furthermore, models for predicting the values of the compressive strength, modulus of elasticity, and flexural strength of SCRC were designed and verified with the experimental results of 12 other studies. According to the obtained results, mixtures with up to 15% of recycled rubber and 5% of silica fume, with 28 days compressive strength above 30 MPa, were found to be optimal mixtures for the potential future investigation of reinforced self-compacting rubberized concrete structural elements.

Mechanical Properties of Double Layer Rubberized Concrete Paving Blocks

2014 ◽  
Vol 911 ◽  
pp. 463-467 ◽  
Author(s):  
Euniza Jusli ◽  
Hasanan M. Nor ◽  
Putra Jaya Ramadhansyah ◽  
Haron Zaiton
Keyword(s):  
Compressive Strength ◽  
Double Layer ◽  
Fine Aggregate ◽  
Rubberized Concrete ◽  
Rubber Content ◽  
Waste Rubber ◽  
Load Carrying ◽  
Compressive Strength Test ◽  
Solid Load ◽  
Different Levels

This paper sought to evaluate the influences of different levels of waste rubber tyre (rubber granules) as an aggregate replacement in the production of double layer concrete paving blocks (CPBs). Waste rubber tyres were used as an aggregate replacement at the levels of 0%, 10%, 20%, 30%, and 40%. The characteristics of the double layer rubberized CPB were examined via a series of tests. According to the results, the density, porosity, and compressive strength of the double layer rubberized CPB is highly influenced by the percentage of rubber content. The compressive strength test has proven that by using rubber granules as an aggregate, the compressive strength is able to be manipulated. As the percentage of rubber granules increase, the compressive strength will decrease as the amount of solid, load-carrying material reduces. Compressive strength was at its peak when the rubber content was at 10%. 1-4 mm rubber granules were used as a replacement of fine aggregate and 5-8 mm rubber granules as coarse aggregate; both at the level of 40%. As a result, a double layer rubberized CPB with 28-days compressive strength of maximum 28 MPa is produced.

Properties of Unfired Building Bricks Prepared from Fly Ash and Residual Rice Husk Ash

2015 ◽  
Vol 754-755 ◽  
pp. 468-472 ◽  
Author(s):  
Chao Lung Hwang ◽  
Trong Phuoc Huynh
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Flexural Strength ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Fine Aggregate ◽  
Test Results ◽  
Design Algorithm ◽  
Potential Applications ◽  
Hardened Properties

This work investigates the possibility of using fly ash (FA) and Vietnam residual rice husk ash (RHA) in producing unfired building bricks with applying densified mixture design algorithm (DMDA) method. In this research, little amount of cement was added into the mixtures as binder substitution. Unground rice husk ash (URHA), an agricultural by-product, was used as partial fine aggregate replacement (10% and 30%) in the mixtures. The solid bricks of 220×105×60 mm in size were prepared in this study. The hardened properties of the bricks were investigated including compressive strength, flexural strength and water absorption according to corresponding Vietnamese standards. Forming pressure of 35 MPa was applied to form the solid bricks in the mold. The test results show that all brick specimens obtained good mechanical properties, which were well conformed to Vietnamese standard. Compressive strength and flexural strength of the bricks were respectively in range of 13.81–22.06 MPa and 2.25–3.47 MPa. It was definitely proved many potential applications of FA and RHA in the production of unfired building bricks.

Manufacture of High-Performance Concrete Made with Powdered Polyester Resin Waste and Carboxylic-Ester Based Superplasticizer

2015 ◽  
Vol 1129 ◽  
pp. 523-529 ◽  
Author(s):  
A. Rodríguez ◽  
Pablo Luis Campos ◽  
J. Garabito ◽  
Juan García ◽  
Isabel Santamaría
Keyword(s):  
Silica Fume ◽  
High Performance ◽  
Polyester Resin ◽  
High Performance Concrete ◽  
The Other ◽  
Partial Substitution ◽  
Fine Aggregate ◽  
Hardened State ◽  
Aggregate Material ◽  
Research Show

A high-performance concrete design is presented that incorporates powdered polyester resin waste as a fine aggregate material in partial substitution of sand, with additions of both a superplasticizer based on carboxylic ethers and silica fume. The potential application of the powdered polyester resin and its properties as an aggregate are both analysed as well as the mechanical behaviour, in both the fresh and the hardened states, of the concrete. Both the flexural and the compressive strength of the concrete were shown to depend on the amount of waste used in substitution of the sand. The results of the research show that the designed concrete reaches the resistances of a high performance concrete with values ​​above 50 MPa. On the other hand, the rest of its properties are equivalents, both in the fresh and hardened state, proportional to the amount of powdered polyester resin that is added. However, to achieve this, the use of superplasticizers additives and admixtures of silica fume is necessary.

scholarly journals Analysis of the mechanical properties of the concrete with partial substitution of the kind’s aggregate glass powder

2021 ◽  
Vol 9 (6) ◽  
pp. 406-425
Author(s):  
Paulo Ricardo Alves dos Reis Santos ◽  
Diovana da Silva Santos ◽  
Max Silva de Almada ◽  
Lirana Lamara Barreto da Silva ◽  
Italo Gutierry Carneiro da Conceição ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Large Scale ◽  
Glass Powder ◽  
Experimental Methodology ◽  
Partial Substitution ◽  
Fine Aggregate ◽  
Structural Concrete ◽  
Natural Sand ◽  
Hardened State ◽  
Object Of Study

In this study, the influence of partial introduction as glass as fine aggregate on the composition of simple concrete is analyzed, considering that sand (fine aggregate currently used) has been used on a large scale in civil construction over the years and has been affecting the environment. The main objective of this research was to analyze the mechanical properties of concrete, partially replacing the natural sand with another fine aggregate made from glass residues, evaluating the behavior presented at the end of each test using different percentages of this material as fine aggregate in the concrete composition. From an experimental methodology that consisted of determining an object of study (concrete), selecting the variable that would possibly be able to influence it (glass powder) and defining the ways of controlling and observing the effects that the variable would produce on the object, an interpretation of how the mechanical properties of the glass powder that affect the performance of structural concrete is presented. The granulometry was subsequently analyzed, the tests carried out both in the fresh and hardened state of the concrete, and identified that the glass in a certain percentage proves to be viable. Finally, it can be concluded that the partial inclusion of glass affects the mechanical properties of structural concrete, and can present quite satisfactory results, both related to the environment, since the sand would not be used entirely as fine aggregate or in reaching a resistance suitable for its final use.

scholarly journals Evaluation of Physical Characteristics and Sorption of Cement Mortars with Recycled Ceramic Aggregate

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7852
Author(s):  
Agata Stolarska ◽  
Teresa Rucińska
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Thermal Conductivity Coefficient ◽  
Sorption Isotherms ◽  
Sorption Kinetics ◽  
Fine Aggregate ◽  
Air Content ◽  
Nonstationary Method ◽  
Moisture Conditions

The subjects of this study were mortars with varying amounts of recycled ceramic aggregate (RCA). As part of the fine aggregate, the RCA volume share is 10%, 20%, 30%, 50% and 100%. First, fresh mixture parameters were evaluated, such as consistency and air content measurement by pressure method. Next, specimens were molded for compressive strength and flexural strength tests after 7, 28 and 56 days of curing. The thermo-humidity parameters of the composites, i.e., coefficient of capillary action and thermal conductivity coefficient were also investigated using nonstationary method. Sorption kinetics of the mortars at different moisture conditions at 20 °C were also evaluated. Sorption tests were carried out using two methods: TM and DVS. The sorption isotherms were plotted on the basis of equilibrium moisture content for the materials tested. The isotherms obtained by the two methods were evaluated. The results allowed us to draw conclusions on the physical and mechanical parameters of the composites with different amounts of RCA and to evaluate the ability to absorb moisture from the environment by these types of materials. A clear decrease in the compressive strength after 28 days of curing compared to the reference mortar was recorded after using 30% to 100% of RCA (approx. 26% to approx. 39%). Changes in flexural strength were significantly smaller, reaching no more than approx. 7.5%. It was shown that the amount of RCA translates into the ability to sorb moisture, which may affect the application of this type of composites. The amount of RCA translates also into the thermal conductivity coefficient, which decreased with increasing amount of RCA.

scholarly journals THE STRENGTH OF CONCRETE WITH AN ELASTIC ADDITIVE OF TIRES RUBBER WASTE UNDER CYCLIC LOADING

2009 ◽  
Vol 1 (4) ◽  
pp. 172-182
Author(s):  
Gintautas Skripkiūnas ◽  
Audrius Grinys
Keyword(s):  
Compressive Strength ◽  
Cyclic Load ◽  
Internal Stresses ◽  
Cement Stone ◽  
Cyclic Loads ◽  
Rubberized Concrete ◽  
Rubber Waste ◽  
Significant Difference ◽  
Residual Strains ◽  
Concrete Matrix

Concrete strength under cyclic loads is much lower compared to short-term loading strength because cyclic loads stimulate the growth of microcracks in the cement matrix, reduce the adherence of cement stone and aggregates and cause higher creep deformations. The paper presents the deformations of samples with or without a rubber waste additive subjected to cyclic loads and determined by the methods developed during research. The obtained results show that relative plastic strains under cyclic load and relative residual strains after the removal of the load depend on the rubber additive. Relative strains in the rubberized concrete samples loaded at 70% prism compressive strength are 63% higher and residual strains after the removal of the load are 234% higher. When the samples are loaded at 80% of prism compressive strength, relative strains and residual strains after the removal of the load in concrete with the rubber additive are respectively 56% and even 360% higher if compared to the samples without the rubber additive. When the samples are loaded at 90% of prism compressive strength, the obtained respective relative strains are 63% and 219% higher compared to the samples without rubber additives. An increase in relative plastic and residual strains shows the influence of the rubber additive on the stress-strain behaviour of concrete subjected to cyclic loads. The conducted investigation has revealed that concrete with rubber waste additive under cyclic loads changes ultimate strains. We can see a significant difference in the yield deformations leading to the ultimate failure of concrete with or without the rubber additive. When the samples of rubberized concrete are loaded at 70% of prism compressive strength, the longitudinal ultimate strains are 36% higher; loading at 80% results in 47% higher strains and that at 90% results in 42% higher strains compared to the non-rubberized concrete samples. The analysis of changes in deformation conducted by the created method does not give a precise forecast as to the number of cycles that one or another type of concrete will resist under a certain load. Nevertheless, the obtained changes in deformations enable to make rather precise decisions with regard to the ability of concrete to absorb cyclic stresses with the higher strains of the concrete matrix. A detailed analysis of the test results has revealed the following tendencies: concrete with rubber additives has better deformation abilities under cyclic loads because of bigger plastic (residual) strains and bigger ultimate strains. This leads to the presumption that rubber additives present in the concrete matrix are able to absorb cyclic-load-stimulated internal stresses driving the concrete fragmentation process.

scholarly journals Effect of Water-Cement Ratio on the Properties of NaOH-Treated Rubberized Mortar

2020 ◽  
Vol 862 ◽  
pp. 135-139
Author(s):  
Dhabit Zahin Alias Tudin ◽  
Ahmad Nurfaidhi Rizalman
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Crumb Rubber ◽  
Fine Aggregate ◽  
Volume Percentage ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Effect Of Water ◽  
Hardened Properties ◽  
Rubberized Mortar

In this study, crumb rubber was used to partially replaced fine aggregate in mortar mixture by 5, 10, 15 and 20 volume percentage (vol%) with untreated and NaOH-treated crumb rubber. There were three (3) different water-cement ratio used which are 0.45, 0.50 and 0.55. Thus, the total number of mixtures was 27. The mortars were tested for flowability, compressive strength, flexural strength and density. Based on the results, higher water cement ratio and percentage of crumb rubber replacement increased the flowability but lowered the density, compressive strength and flexural strength of the rubberized mortar. It was also discovered that the significant effect of water-cement ratio on the fresh and hardened properties of the rubberized mortar was due to the water content in the mixture. Meanwhile, the use of NaOH as treatment to crumb rubber improved the flowability, compressive strength and flexural strength of the rubberized mortar.

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