Hydration Kinetics Model of Rice Husk Ash-Blended System

2020 ◽  
Vol 842 ◽  
pp. 306-313
Author(s):  
Lang Wu ◽  
Ru Yu Yan ◽  
Jun Yao Cai ◽  
Wen Xia Yue
Keyword(s):  
Rice Husk ◽  
High Performance ◽  
Rice Husk Ash ◽  
High Performance Concrete ◽  
Mineral Admixture ◽  
Kinetics Model ◽  
Chemical Effect ◽  
Hydration Kinetics ◽  
Cement System ◽  
Cementitious System

Rice husk ash (RHA) is a highly active pozzolanic material produced by rice husk combustion control, and it is widely used as a mineral admixture in the production of high performance concrete. The addition of rice husk ash has a complex effect on cement hydration. Current models do not explain all these complex effects. In this paper, the hydration kinetics model of RHA-cement cementitious system was established by considering the dilution effect, chemical effect and water absorption and release of porous structure of rice husk ash to composite cementitious system. Compared with the experimental results, it is proved that the model can simulate the cementitious system containing RHA-cement well. The hydration process of RHA-cement system can be used to predict the hydration degree of RHA-cement system changing with age.

Strength Characteristics of Concrete with Indian Mettakaolin and Rice Husk Ash

2017 ◽  
Vol 13 ◽  
pp. 6140-6150
Author(s):  
A.N. Swaminathen ◽  
S.Robert Ravi
Keyword(s):  
Rice Husk ◽  
High Performance ◽  
Rice Husk Ash ◽  
High Performance Concrete ◽  
Construction Material ◽  
High Strength ◽  
Mineral Admixture ◽  
Engineering Properties ◽  
Partial Replacement ◽  
Strength Development

 Concrete is the most extensively used construction material around the world and its properties have been undergoing changes through technological advancements. Varieties of concrete have been developed to enhance the different properties of concrete. An investigation in to the potential use of partial replacement of mineral admixture in high performance concrete (HPC) has carried out. The engineering properties of fresh and hardenedconcrete are obtained by conducting test on slump, vee-bee, compaction factor and compressive strength, flexural strength, spilt tensile strength and modulus of elasticity, in this project partial replacement of cement bymetakaolin and rice husk ash been used for varying replacement of 0+0%, 5+105, 7.5+10%,10+10%,5+12.5%, 10+12.5%, 5+15%, 7.5+15%,  and 10+15%for high strength, workability and also an eco-friendly by less emission of co2. It has been concluded that strength development of concrete blended with metakaolin and rice hush ash was enhanced. It was found that in 7.5% replacement of metakaolin and 12.5% replacement of rice husk ash appear to be the optimum replacement which exhibited more strength. This investigation has proved that the MK and RHA concrete can be used as structural concrete at suitable replacement percentage. 

scholarly journals Behaviour of High Performance Concrete with Multi Compound Composite Cement

2020 ◽  
Vol 9 (1) ◽  
pp. 2405-2411
Keyword(s):  
Fly Ash ◽  
Silica Fume ◽  
Rice Husk ◽  
High Performance ◽  
Rice Husk Ash ◽  
High Performance Concrete ◽  
Mineral Admixture ◽  
Mineral Admixtures ◽  
Split Tensile Strength ◽  
Mix Proportion

This study investigates about the behaviour of high performance concrete produced with multi component composite cements. Here, the cement is partially replaced with certain mineral admixtures. The mineral admixture used in the study are fly ash, rice husk ash, silica fume and ground granulated blast furnace slag in various percentages up to 50%. The mix proportion for fly ash and rice husk ash are kept constant thought the study as 25% and 7.5% respectively. The Mechanical properties such as (Compressive strength, split tensile strength, flexural strength and modulus of elasticity), Durability tests (Acid test, Sorptivity), permeability test and Non Destructive test are performed on M40 grade concrete cube material property, cylinder and prism. The outcomes were analyzed with the controlled mix. The results shown that the M3 mix ( 50% cement, 25% fly ash, 7.5% RHA,7.5 % silica fume and 10 % GGBS) obtained optimum strength, durability and other properties when analyzed with the other mixes.

Comparison of two processes for treating rice husk ash for use in high performance concrete

2009 ◽  
Vol 39 (9) ◽  
pp. 773-778 ◽  
Author(s):  
Andres Salas ◽  
Silvio Delvasto ◽  
Ruby Mejía de Gutierrez ◽  
David Lange
Keyword(s):  
Rice Husk ◽  
High Performance ◽  
Rice Husk Ash ◽  
High Performance Concrete

Value Analysis and Properties Investigation of High Performance Rice Husk Ash Concrete

2013 ◽  
Vol 773 ◽  
pp. 293-297 ◽  
Author(s):  
Lee Kuo Lin ◽  
Wei Sheng Wu ◽  
Hubert Lee
Keyword(s):  
Rice Husk ◽  
High Performance ◽  
Rice Husk Ash ◽  
High Performance Concrete ◽  
Green Building ◽  
Global Village ◽  
Value Analysis ◽  
Carbon Reduction ◽  
Pozzolanic Material ◽  
Strength And Durability

During recent years, the Taiwan government launches issues of green building , sustainable engineering , carbon reduction and etc. , to promote balance construction and environment ecology. One of the most important materials in those engineering issues is cement which is used widely in construction industry. Cement emits 0.85 tons of carbon dioxide (CO2) for each ton of cement used in average. This not only causes the waste of energy but also againsts the conception of environmental protection. This research uses the rice husk ash (RHA) which people always regards as the waste material as a pozzolanic material to replace part of cement to make high performance concrete (HPC). Then makes the value analysis and properties investigation for HPC. Based on this research, rice husk (RH) will contain lots of silicon dioxide (SiO2) after burning into RHA. If use RHA to replace part of cement, it can get appropriate properties of compressive strength and durability. More important is that by replacing part of cement, it not only will reduce the emission of CO2 and save money but also reach the goal of global village protection on earth.

scholarly journals Assessment of the Durability Dynamics of High-Performance Concrete Blended with a Fibrous Rice Husk Ash

Crystals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 75
Author(s):  
David O. Nduka ◽  
Babatunde J. Olawuyi ◽  
Olabosipo I. Fagbenle ◽  
Belén G. Fonteboa
Keyword(s):  
Rice Husk ◽  
High Performance ◽  
Rice Husk Ash ◽  
High Performance Concrete ◽  
Cost Effective ◽  
Attenuated Total Reflection ◽  
Partial Replacement ◽  
X Ray ◽  
Durability Properties ◽  
Chemical Attack

The present study examines the durability properties of Class 1 (50–75 MPa) high-performance concrete (HPC) blended with rice husk ash (RHA) as a partial replacement of CEM II B-L, 42.5 N. Six HPC mixes were prepared with RHA and used as 5%, 10%, 15%, 20%, 25%, and 30% of CEM II alone and properties are compared with control mix having only CEM II. The binders (CEM II and RHA) were investigated for particle size distribution (PSD), specific surface area (SSA), oxide compositions, mineralogical phases, morphology, and functional groups using advanced techniques of laser PSD, Brunauer–Emmett–Teller (BET), X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared/attenuated total reflection (FTIR/ATR), respectively, to understand their import on HPC. Durability properties, including water absorption, sorptivity, and chemical attack of the HPC samples, were investigated to realise the effect of RHA on the HPC matrix. The findings revealed that the durability properties of RHA-based HPCs exhibited an acceptable range of values consistent with relevant standards. The findings established that self-produced RHA would be beneficial as a cement replacement in HPC. As the RHA is a cost-effective agro-waste, a scalable product of RHA would be a resource for sustainable technology.

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