Effect of rice husk ash admixed with treated sisal fibre on properties of lateritic soil as a road construction material

Great areas of Brazil present lateritic soils, such as the northeast and the south. Some of these soils have, as main characteristic, instable structures that can present considerable volumetric deformation in the presence of water. This behavior, also named collapse, is responsible for several problems on the building construction such as cracks and fractures that can damage the safety of structures. The aim of this paper is to assess the possibility of improvement of collapsible behavior of a lateritic soil using rice husk ash (RHA). A previous characterization of soil and RHA was performed in order to assess the combined effect of soil/RHA. The results are so promising, showing a new alternative to reduce the collapsible behavior of soils using an environmental friendly technology.

Download Full-text

Study on strength and durability characteristics of polypropylene fiber reinforced blended concrete tiles

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.13906 ◽

2018 ◽

Vol 7 (3) ◽

pp. 1544

Author(s):

N K. Amudhavalli ◽

M Harihanandh

Keyword(s):

Rice Husk ◽

Rice Husk Ash ◽

Construction Material ◽

Polypropylene Fiber ◽

Fiber Reinforced ◽

Abrasion Test ◽

Brittle Behavior ◽

Curing Period ◽

Strength And Durability ◽

Constant Percentage

Concrete is brittle and widely used as an artificial construction material with incorporation of cement, water and aggregate in necessary proportions. To overcome the brittle behavior of composites, fibers and admixture are added to the concrete. In this present investigation Polypropylene Fiber is added in varying percentage (0.2%, 0.4%, 0, 6%, 0.8% and 1%) to the weight of cement and constant percentage of Rice Husk Ash (15%) is replaced with cement. The polypropylene fiber reinforced blended concrete tiles of size 300mm x 300mm x 30mm are cast as per the code and tested at 28 days curing period. Flexural strength, Abrasion test, Dimensional quality and water absorption are studied. Among different proportion of Polypropylene Fiber Reinforced Blended Concrete, the best performance is achieved by the combination of 15% of Rice Husk Ash with 0.6% of Polypropylene Fiber.

Download Full-text

Rice husk ash as an indigenous construction material in building process, a statistical evaluation

10.30574/gscaet.2021.1.1.0025 ◽

2021 ◽

Vol 1 (1) ◽

pp. 028-038

Author(s):

Ndubuisi Micheal Odoanyanwu ◽

Ifeanyichukwu Hyginus Ivoke ◽

Maduabuchi Vitalis Irouke

Keyword(s):

Production Process ◽

Rice Husk ◽

Rice Husk Ash ◽

Process Analysis ◽

Construction Material ◽

Climatic Conditions ◽

Estimation Methods ◽

Confidence Estimation ◽

Missing Value ◽

Value Analysis

The research described the rice husk ash as an indigenous construction material used in building production process of the concrete design mix. The production process is analyzed statistically. The quality of concrete mixture is of inevitable concern to all stakeholders in the construction industry and on building production process in the zone when the climatic conditions of the zone are considered. The mix design ratio is investigated and all the prevailing construction/production practices are considered statistically to portray the experimental results in the system. The statistical tools applied in this research for clarity of the results are descriptive, normality, missing value analysis, process statistical summary and confidence estimation methods of statistics. The experimental matrix was designed using three level four factors. Twenty five (25) experimental runs was conducted the M-Estimator was used to obtain the missing value analysis, the estimate of the output parameter at each selected factor levels. The results show that all the factors selected are fit for the experimental analysis. The factors in M-estimators show that the response (Slump) can be as low as 68.8924mm and as high as 145.5352mm. In descriptive statistic, the mean for the parameters: cement, water, fine husk, coarse aggregate and slump are 242.56 kg/m3, 6.00 kg/m3, 568.56 kg/m3, 111544 kg/m3 and 110.84mm respectively. The tools portray the necessary information in the data to understand what the data information for further experimental process analysis.

Download Full-text

Rice Husk Ash as a Cement Replacement in High Strength Sustainable Concrete

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1007.90 ◽

2020 ◽

Vol 1007 ◽

pp. 90-98

Author(s):

Ash Ahmed ◽

Fraser Hyndman ◽

John Kamau ◽

Heni Fitriani

Keyword(s):

Mechanical Properties ◽

Rice Husk ◽

Rice Husk Ash ◽

Construction Material ◽

Cementitious Materials ◽

Supplementary Cementitious Materials ◽

Strength Development ◽

Coal Waste ◽

Environmental Implications ◽

Sustainable Concrete

Cement is the most utilized construction material. The energy-intensive processes that are involved in its production contribute up to 10% of total global CO2 emissions, with potentially adverse environmental implications. It is however possible, that energy and cost efficiency can be achieved by reducing on the amount of clinker, and in its place utilising supplementary cementitious materials (SCMs) or pozzolans that require less process heating and emit fewer levels of CO2. Currently, most sustainable concrete uses either GGBS (slag) or PFA (fly ash) to reduce the quantity of cement used in construction and highways applications. GGBS and PFA come from industries (steel and coal waste respectively) which are in decline that should not be relied upon in the long term. This report shows that cement in concrete can also be replaced with rice husk ash (RHA) which actually enhances the mechanical properties. RHA comes from the food production industry and is vital for the growing global population. It is thus a socially responsible objective to use a pozzolan in civil engineering applications that is sourced from an environmentally friendly and sustainable industry. This study investigated the potential of RHA to be used as a SCM by evaluating mechanical properties. Experiments were carried out by supplementing cement in concrete mixes with RHA at up to 10% replacement by mass. Results were compared with a control specimen (100% cement), with a water/binder (w/b) ratio of 0.4 and C32/40 design mix using CEM I. The results show excellent early age strengths with all RHA mixes surpassing 40 MPa strength within 7 days which is contrary to general trends in SCM concrete where strength development is slow in the initial stages in comparsion to 100% cement concrete. All RHA specimens exhibited impressive flexural and tensile strengths.

Download Full-text

Use of Rice Husk Ash (RHA) as a Supplementary Cementitious Material in Producing Normal Concrete

MATEC Web of Conferences ◽

10.1051/matecconf/201927107007 ◽

2019 ◽

Vol 271 ◽

pp. 07007

Author(s):

Kazi islam ◽

Zahid Hossain

Keyword(s):

Rice Husk ◽

Rice Husk Ash ◽

Construction Material ◽

Cementitious Materials ◽

Supplementary Cementitious Materials ◽

Hardened Concrete ◽

Type I ◽

Continuous Increase ◽

Material Sources ◽

By Products

With the continuous increase of scarcity of the natural construction material sources and environmental awareness, utilization of wastes/by-products in the construction industry has become an attractive field of study. Several industrial by-products produced from different manufacturing processes have been considered for various usages in the construction field. This paper briefly describes the potential use of Rice Husk Ash (RHA) as Supplementary Cementitious Materials (SCM). Here, three different grades of RHA (600-RHA, 150-RHA, and 44-RHA) in two different percentages (10 % and 20 %) of replacement of Type I Ordinary Portland Cement (OPC) were investigated. Laboratory tests on the fresh concrete mix as well as the mechanical properties of the hardened concrete were performed. It was observed that coarser RHA-modified concrete (600-RHA and 150-RHA) showed reduced strength properties while finer RHA (44-RHA) exhibited improved concrete properties. Moreover, the incorporation of RHA in concrete was found to be effective in mitigating alkaline expansion.

Download Full-text