Showing papers in "Case Studies in Construction Materials in 2020"

TL;DR: In this article, the use of recycled plastic wastes as a component in cementitious composites has been found to be the most beneficial as it can be used to replace all solid components of the composite.

TL;DR: In this paper, the authors developed an alkali activated self-compacting geopolymer concrete (SCGC) using Ground Granulated Blast furnace Slag (GGBS), incorporated with 2 % nano silica by weight, through evaluation of its fresh and hardening properties.

TL;DR: In this article, the authors investigated the mechanical properties and elevated temperatures of lightweight concrete (LWC) incorporating polypropylene fibre (PPF) and glass fibre (GF), and used five types of concrete mixtures, which were produced to indicate the effects of PPF and GF.

TL;DR: In this article, the effect of different fiber-reinforcements on the mechanical properties of normal strength and high strength concrete was investigated, and the results of mechanical testing show that steel fiber is superior in enhancing the compressive and flexural strength compared to glass and polypropylene fiber.

TL;DR: In this paper, the authors evaluate the results of durability of mortars with external coating in the proportion 1: 1: 6: 1.5 (cement: hydrated lime: sand: water), containing incorporation of 0, 1.0, 3.0 and 5% of fiber of acai treated with NaOH solution.

TL;DR: In this article, the use of small-particle-sized ground POFA to prepare ultrafine POFA (UPOFA) is a suitable method to improve its characteristics as a supplementary cementitious material.

TL;DR: In this paper, the effects of agricultural waste (rice straw, sugarcane bagasse and wheat straw ashes) in clay bricks were investigated and the physical and physical properties of these bricks have been investigated.

TL;DR: In this paper, a comprehensive investigation of the crumb rubber incorporated ECC in terms of its compressive strength, flexural strength, direct tensile strength, and deflection abilities by adding crumbs rubber content as a replacement of fine aggregate, polyvinyl alcohol (PVA) and superplasticizers was performed.

TL;DR: In this article, waste glass powder (WGP) was mixed with the soil sample with various percentages: 2.5 %, 5%, 10 %, 15 %, and 25 % by the dry weight of the soil.

TL;DR: In this article, the influence of coconut fibres and lime on the properties of soil-cement mortar was investigated and the optimum strength was recorded at 0.2 % fibre and 5 % lime addition of the specimen.

TL;DR: In this paper, the authors evaluate the mechanical properties of normal concrete (NC) containing polyethylene terephthalate waste fibers (PETWF) and check the influence the waste has on the behavior of reinforced concrete beams, five mixtures of NC with 0.41 of w/c ratio were tested.

TL;DR: In this paper, the suitability of lime and lime-cement combinations as the stabilizer for compressed stabilized earth blocks (CSEBs) with reduced clay and silt contents was evaluated.

TL;DR: In this paper, the authors considered the possibility of significant improvement of technical properties of granite concrete with the addition of granite dust and found that adding granite dust leads to an increase in the average density of concrete, which is the main reason for increasing the strength of concrete with dust.

TL;DR: In this paper, the bottom ash obtained from Mae Moh electrical powerplant was used as a sustainable material in the production of geopolymer cellular lightweight mortar blocks, and the mix proportions for the solid content consisted of a sand/binder ratio (S/B) of 1:1, and six different bottom ash/cement (BA/C) ratios of 100:0, 90:10, 80:20, 70:30, 60:40 and 50:50 with a constant liquid alkaline activator/Binder ratio at 0.60.

TL;DR: In this paper, processed waste tea ash (PWTA) was used as a replacement for paving blocks at dosages of 10 %, 20 %, 30 %, 40 %, and 60 % by weight of cement.

TL;DR: In this article, a two-factorial design was run using the central composite design (CCD) to generate 13 combinations of cement (reactant) mixtures with standard sand in order to cast mortar prisms whose compressive strength was evaluated according to BS EN standard.

TL;DR: In this paper, a total of 13 mix designs were suggested with two variables: polyvinyl alcohol (PVA) fibre (0.5 %, 1.25 % and 2.0 %) and number of CFRP (1, 3 and 5 layers).

TL;DR: In this paper, the authors used Artificial Neural Networks (ANNs) to predict the experimental value of concrete contribution in shear resistance for RAC beams without transverse reinforcement when knowing the values of 6 inputs (recycled aggregate content, shear span-depth ratio, beam width, beam depth, longitudinal tensile steel ratio, and compressive strength at 28-days).

TL;DR: In this article, a trabajo se produjo concreto anadiendo hule de llantas de desecho, posteriormente se irradio con rayos gamma, for finalmente evaluar sus propiedades mecanicas.

TL;DR: In this article, the effect of human hair as fiber on the fresh, physical and mechanical properties of concrete with 0, 1, 2, 3, and 4% human hair by volume of cement was investigated.

TL;DR: In this paper, the use of two wastes (RHA and CKD) for improving the mechanical strength of a subgrade soil obtained from a failed road section in Nigeria was explored.

TL;DR: In this article, a comparative analysis of the costs and benefits of producing natural and recycled concrete aggregates for concrete works in South Africa was conducted, based on the generation of construction and demolition waste, which continues to escalate as a result of replacement and renovation of existing structures.

TL;DR: In this paper, different percentages of hydrated lime (3, 9% and 15%) and bone ash (5, 10, 15% and 20%) were used to improve the compressive strength of lateritic bricks.

TL;DR: In this article, the use of crushed glass and polypropylene (plastic) granules in two sets of fired clay bricks was investigated, and the results showed that glass can be added to burnt bricks at 5% replacement, while plastic waste should not exceed 3% in burnt bricks.

TL;DR: In this paper, an empirical model which predicts the shear strength of interior reinforced concrete (RC) joints exposed to cyclic loading, is developed using gene expression programming (GEP), five main parameters are used to develop the GEP model including concrete compressive strength, joint transverse reinforcement, beam reinforcement ratio, joint aspect ratio, and joint width.

TL;DR: In this article, the authors studied the properties of self-compacting concrete (SCC) mixed with different levels of fly ash (FA) and calcium carbonate powder (CC).

TL;DR: In this article, a total of 24 cylindrical concrete specimens were constructed and strengthened using locally available and Low-Cost Glass Fiber Reinforced Polymer (LC-GFRP) composites.

TL;DR: In this paper, the authors proposed a roadmap for pozzolanic quality assessment and compared commercial and waste stream pozzolans with industrial by-products (glass E, glass K, metakaolin, fly ash).

TL;DR: In this article, the performance of using banana fiber bars on the mechanical properties of reinforced concrete beams was analyzed and several experimental studies on the utilization of banana fibers to optimize the strength and properties of concrete structures are performed.

TL;DR: In this article, the feasibility of using recycled asphalt pavement (RAP) aggregates in alkali-activated concrete paver blocks was evaluated, and the results of the laboratory study showed that inclusion of RAP aggregates to alkaliactivated concrete reduce the compressive strength and abrasion resistance of the paving blocks.