Properties of EPS RHA lightweight concrete bricks under different curing conditions

Construction and Building Materials

2015

104

Section: Water Absorptionmentioning

confidence: 99%

Investigation into the use of unground rice husk ash to produce eco-friendly construction bricks

Construction and Building Materials

2015

104

“…Water absorption is the major factor that affects the durability of construction bricks. Water absorption is the action of surface tension on capillaries that allows for the transport of liquid in porous solids [37,38]. Figure 6(a) shows the effect of URHA content on the water absorption capacity of brick samples at 28 days of age.…”

Section: Water Absorptionmentioning

confidence: 99%

Evaluation of the Performance and Microstructure of Ecofriendly Construction Bricks Made with Fly Ash and Residual Rice Husk Ash

Advances in Materials Science and Engineering

2015

This research presents the engineering performance and the microstructural characterization of ecofriendly construction bricks that were produced using a binder material made from a mixture of class-F fly ash (FA) and residual rice husk ash (RHA). Unground rice husk ash (URHA) was used as a partial fine aggregate substitute (0–40%). The solid bricks of 220 × 105 × 60 mm in size were prepared by mixing FA and RHA with an alkaline solution and fine aggregates, formed by compressing the mixture in a steel mold under 35 MPa of forming pressure, and then cured at 35°C and 50% relative humidity until the required testing ages. The tests of compressive strength, water absorption, and bulk density were conducted in accordance with relevant Vietnamese standards in order to estimate the effect of the URHA content on the engineering performance of the hardened bricks. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) were performed to determine the microstructure and the phase composition of the brick samples. The results show that properties of these bricks conformed to relevant Vietnamese standards. Therefore, FA and RHA are potential candidate materials for producing ecofriendly construction bricks using geopolymerization technology.

show abstract

“…Raut, Ralegaonkar, and Mandavgane (2013) reported that incorporating 10% RHA in bricks resulted in five times greater compressive strength than conventional fired clay bricks and lower brick density. Ling and Teo (2011) also reported that the level of 10% RHA in bricks resulted in optimal brick characteristics. Additionally, they found that absorption capacity decreased with an increase in the RHA content.…”

Section: Materials Propertiesmentioning

confidence: 94%

“…water absorption is defined as the transport of liquids in porous solids caused by surface tension acting on the capillaries (Ling and Teo 2011). It is a very important indicator of permeability, which directly affects the durability of building bricks.…”

Section: Water Absorptionmentioning

confidence: 99%

An application of blended fly ash and residual rice husk ash for producing green building bricks

Journal of the Chinese Institute of Engineers

Risdianto

2016