Additive manufacturing is gaining ground in the construction industry. The potential to improve on current construction methods is significant. One of such methods being explored currently, both in...

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Additive manufacturing of concrete in construction: potentials and challenges of 3D concrete printing

Fly ash-based geopolymer: clean production, properties and applications

A review on fly ash characteristics – Towards promoting high volume utilization in developing sustainable concrete

Mechanical properties of high performance concrete reinforced with basalt fiber and polypropylene fiber

Compressive strength and chloride resistance of self-compacting concrete containing high level fly ash and silica fume

Mechanical properties and fracture behavior of basalt and glass fiber reinforced concrete: An experimental study

Durability performance of concrete incorporating Class F and Class C fly ashes

Comparison on efficiency factors of F and C types of fly ashes

With its low unit weight, expanded perlite (EP) offers significant advantages in heat and sound insulation in the construction sector. However, due to its high-water absorption capacity, EP affects the physical and mechanical properties of concrete negatively. Therefore, it is aimed to reduce water absorption by coating the EP with polymer and thus to improve its mechanical and physical properties. In this study, mortar production was carried out by replacing coated and uncoated EP with CEN reference sand at 0%, 20%, 40%, 60%, and 80% respectively. The effective water/cement ratio of all produced mortar samples was determined to be 0.6. For coated and uncoated EP aggregate mortar series, unit weight, compressive strength, bending tensile strength, water absorption, ultrasonic pulse velocity (UPV), and thermal conductivity coefficient were determined. The results showed that the unit weight of the mortar samples decreased as the amount of EP increased, but their physical and mechanical properties also changed. Mortar samples with better thermal insulation properties were obtained with decreasing thermal conductivity values. The polymer coating of EP improved physical and mechanical properties. Especially in the 80% substituted EP series, the thermal conductivity decreased from 1.20 to a coefficient of 0.91 W/mK.

Investigation of physical and mechanical properties of mortars produced by polymer coated perlite aggregate

DOI: 10.7764/RDLC.17.3.337 This paper presents the modeling of an experimental investigation carried out to evaluate some mechanical and durability properties of concrete mixtures in which cement was partially replaced with Class C and Class F fly ash. A total of 39 mixtures with different mix designs were prepared. After compressive strength testing, the mixtures containing Class F and Class C fly ashes which had similar compressive strength values to control mixtures at 28 d for each series were used for sulfate resistance tests. The degree of sulfate attack was evaluated using expansion and weight loss. The test results indicated that Class C fly ash showed higher compressive strength than Class F fly ash. Moreover, the addition of fly ash significantly increased the resistance to sulfate attack when each amount of fly ash addition regardless of fly ash types was employed. In this paper, the Artificial Neural Network (ANNs) techniques were used to model the relative change in the weight and length of the concrete exposed to sulfate. The best algorithm for length changes of concrete exposed to sulfate is BFGS quasi-Newton backpropagation algorithm while the best algorithm for weight changes of concrete exposed to sulfate is the Levenberg-Marquardt backpropagation algorithm.

https://scielo.conicyt.cl/pdf/rconst/v17n3/0718-915X-rconst-17-02-00337.pdf

Veysel Akyuncu

Papers

Mechanical properties and fracture behavior of basalt and glass fiber reinforced concrete: An experimental study

Durability performance of concrete incorporating Class F and Class C fly ashes

Comparison on efficiency factors of F and C types of fly ashes

Investigation of physical and mechanical properties of mortars produced by polymer coated perlite aggregate

Modeling the weight and length changes of the concrete exposed to sulfate using artificial neural network