Performance Evaluation of Thermal Insulation Rubberized Mortar Modified by Fly Ash and Glass Fiber

Abstract

The utilization of waste rubber as a viable option for manufacturing building materials holds great significance for the sustainable development of the construction industry. This study explores the addition of two additives, fly ash (FA) and glass fiber (GF), to rubberized mortar in order to improve its performance. The impact of different waste rubber powder (RP) replacement rates and modified additive dosages on the performance of rubberized mortar, including fluidity, mechanical properties, drying shrinkage, impact resistance, and thermal insulation properties, was investigated. Furthermore, the analytic hierarchy process (AHP) was adopted to study the priorities of the rubberized mortar modified by FA and GF. The results indicate that the addition of RP leads to a decrease in mortar fluidity, mechanical properties, and drying shrinkage. However, it can enhance its impact resistance and thermal insulation properties. The additives, FA and GF, have a significant influence on the properties of rubberized mortar. By means of AHP method analysis, this study concludes that the optimal comprehensive properties of FA- and GF-modified rubberized mortar can be achieved by replacing 10% of sand with RP and using 10% FA and 0.4% GF. This study presents a configuration method for modified thermal insulation rubberized mortar, and it may lead to FA and GF being considered potential candidates for developing environmentally friendly building materials.

Feasibility of Recycled Aggregate Concrete in a Novel Anchoring Connection for Beam-to-Concrete-Filled Steel Tube Joints

“…(5) Deformations of the connecting plate and CFST are negligible, and their stiffness could be assumed to be infinity in the determination of the initial stiffness of a beamto-column joint using the component method. (6) The proposed formulas could reasonably predict the anchorage strength of the connecting plates with holes and notches. The current method for perfobond rib connectors somewhat underestimates the anchorage strength of the connecting plates with rebars, likely due to the lack of consideration of the confining effect in CFSTs, which is a major difference compared with that in perfobond rib connectors.…”

“…With rapid urbanization, lots of infrastructures are demolished worldwide, resulting in a huge amount of construction waste. This had led to severe impacts on the environment and sustainability [1][2][3][4][5][6][7]. To solve this issue, we proposed using crushed waste concrete as the coarse aggregate of concrete, named recycled aggregate concrete (RAC) [8][9][10].…”

Combined Effects of Steel and Glass Fibres on the Fracture Performance of Recycled Rubber Concrete

“…Therefore, numerous researchers have explored methods to improve the mechanics properties of RRC [19][20][21]. One effective method to improve the fracture properties of concrete is to add fibres within the concrete [22][23][24][25]. From a comprehensive perspective, the incorporation of fibres can significantly enhance the fracture properties of concrete; however, the enhancement effect of different fibres varies.…”

Study on the Dynamic Performance and Damage Evaluation of Rubber-Modified Non-Autoclaved Concrete Pipe Piles under Axial Drop Hammer Impact

“…Some experts and scholars uphold the concept of green energy-saving and have attempted to crush the rubber materials in waste tires into particles and add them to the concrete. This approach had yielded recycled rubber concrete with lower brittleness and higher impact resistance [16][17][18][19][20][21]. Our team attempted to incorporate recycled rubber particles into NAP concrete to produce rubber-modified non-autoclaved pipe pile (NAPR) concrete.…”