scholarly journals Milling time influence of ultrafine treated rice husk ash to pozzolanic reactivity in portlandite

2016 ◽  
pp. 527-530
Author(s):  
Muhd Fadhil Nuruddin ◽  
Siti Asmahani Saad ◽  
Nasir Shafiq ◽  
Maisarah Ali
Keyword(s):  
Rice Husk ◽  
Milling Time ◽  
Rice Husk Ash ◽  
Pozzolanic Reactivity

Effect of Milling Process for Rice Husk Ash on Mechanical Strength of Blended Portland Cement Mortars

2014 ◽  
Vol 600 ◽  
pp. 240-249
Author(s):  
Everton Jose da Silva ◽  
Maria Lidiane Marques ◽  
Antonio Rogério B. Vasconcelos ◽  
Jorge L. Akasaki ◽  
Mauro M. Tashima ◽  
...  
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Agricultural Waste ◽  
Research Area ◽  
Milling Process ◽  
Low Carbon ◽  
Waste Products ◽  
Pozzolanic Reactivity ◽  
Cement Mortars ◽  
Sugar Cane Bagasse Ash

Nowadays, the reuse of waste products in the construction process is a priority research area. Several industrial and agricultural waste products have been investigated, such as fly ash, sugar cane bagasse ash and rice husk ash. This paper analyzes a very important aspect under intense discussion in the scientific community: the Rice Husk Ash (RHA) grinding process. This paper investigates a low carbon RHA with high pozzolanic reactivity produced under uncontrolled burning conditions. The compressive strength of mortar specimens prepared using both ground and natural RHA were tested for 3-56 days and the capillarity absorption was measured for mortars cured during 28 days. Very promising and interesting results were obtained using natural rice husk ash in the production of blended mortars.

Pozzolanic reactivity of mesoporous amorphous rice husk ash in portlandite solution

2014 ◽  
Vol 59 ◽  
pp. 111-119 ◽  
Author(s):  
Viet-Thien-An Van ◽  
Christiane Rößler ◽  
Danh-Dai Bui ◽  
Horst-Michael Ludwig
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Pozzolanic Reactivity

scholarly journals Stabilization of Earth Block Using Rice Husk Ash as Partial Replacement in Cement

2021 ◽  
pp. 12-22
Author(s):  
S. E. Ubi ◽  
P. O. Nkra ◽  
R. B. Agbor
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Crystalline Silicon ◽  
High Specific Surface Area ◽  
Partial Replacement ◽  
Testing Specimen ◽  
Pozzolanic Reactivity ◽  
Pozzolanic Material ◽  
Compressed Earth Block ◽  
Earth Block

The most outstanding problem militating the production of earth block in Nigeria, is the exorbitant prices of cement, rice ash replaced with cement, stabilized compressed earth block to carry load. The main objective of this study was to investigate the sustainability of earthen construction block with a partial replacement of cement using Rice Husk Ash (RHA). RHA is a bye-product material obtained from the combustion of rice husk which consists of non-crystalline silicon dioxide with high specific surface area and high pozzolanic reactivity using a set of sieves 3.35um - 63um, weigh balance, oven maintained at a temperature of 105°C and 110°C, six meta trays, a bucket, a soap, wire brushes, and a mechanical shaker. It is used as pozzolanic material in earth block. Testing specimen were determined and examine in structural composition by means of unconfined compressive strength hydraulically compressed for crushing the composition of mix with RHA content ranges from 10% to 50% to respectively. The result of the compressed earth block shows a significant resistance of shear strength of 30 to 90 kg/mm2, proving that stabilized earth block can satisfactorily carry load when structurally loaded and can resist tensile and compressive stresses.

scholarly journals Pozzolanic Reactivity of Silica Fume and Ground Rice Husk Ash as Reactive Silica in a Cementitious System: A Comparative Study

Materials ◽  
2016 ◽  
Vol 9 (3) ◽  
pp. 146 ◽  
Author(s):  
Weiting Xu ◽  
Tommy Lo ◽  
Weilun Wang ◽  
Dong Ouyang ◽  
Penggang Wang ◽  
...  
Keyword(s):  
Comparative Study ◽  
Silica Fume ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Pozzolanic Reactivity ◽  
System A ◽  
Cementitious System ◽  
Reactive Silica

scholarly journals Pozzolanic Reactivity and the Influence of Rice Husk Ash on Early-Age Autogenous Shrinkage of Concrete

2019 ◽  
Vol 6 ◽  
Author(s):  
Muhammad Nasir Amin ◽  
Syed Hissan ◽  
Khan Shahzada ◽  
Kaffayatullah Khan ◽  
Tayyaba Bibi
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Autogenous Shrinkage ◽  
Early Age ◽  
Pozzolanic Reactivity

scholarly journals Strength of Concrete with RHA and Metakaolin

2019 ◽  
Vol 9 (2) ◽  
pp. 4689-4693
Keyword(s):  
Silica Fume ◽  
Rice Husk ◽  
Slow Rate ◽  
Rice Husk Ash ◽  
Interfacial Transition Zone ◽  
Solid Materials ◽  
Pozzolanic Reactivity ◽  
Chemical Admixtures ◽  
Early Strength

HPC can be produced by incorporating fine ground solid materials like Metakaolin and RHA to strengthen the interfacial transition zone and chemical admixtures and also reduces the ratio between water to binder. The pozzolanic reactivity of rice husk ash and Metakaolin are very low at initial ages. So for the production of HPC, along with metakaolin and rice husk ash when silica fume is combined, the slow rate of hydration RHA and metakaolin will be compensated by the silica fume to have a better early strength. Hence, the effect of RHA and Metakaolin is combined together to get the quality of sturdiness attributes of HPC. The fatigue strength of HPC is compared for both the materials.

Mesoporous structure and pozzolanic reactivity of rice husk ash in cementitious system

2013 ◽  
Vol 43 ◽  
pp. 208-216 ◽  
Author(s):  
Viet-Thien-An Van ◽  
Christiane Rößler ◽  
Danh-Dai Bui ◽  
Horst-Michael Ludwig
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Mesoporous Structure ◽  
Pozzolanic Reactivity ◽  
Cementitious System

Mechanoactivation Of Rice Husk Ash In Laboratory Conditions

2019 ◽  
pp. 20-26
Keyword(s):  
Mechanical Activation ◽  
Rice Husk ◽  
Amorphous Silica ◽  
Silicon Oxide ◽  
Rice Husk Ash ◽  
Pozzolanic Activity ◽  
Maximum Solubility ◽  
Laboratory Conditions ◽  
Before And After ◽  
Mineral Additive

In many rice producing countries of the world, including in Vietnam, various research aimed at using rice husk ash (RHA) as a finely dispersed active mineral additive in cements, concrete and mortars are being conducted. The effect of the duration of the mechanoactivation of the RHA, produced under laboratory conditions in Vietnam, on its pozzolanic activity were investigated in this study. The composition of ash was investigated by laser granulometry and the values of indicators characterizing the dispersion of its particles before and after mechanical activation were established. The content of soluble amorphous silicon oxide in rice husk ash samples was determined by photocolorimetric analysis. The pizzolanic activity of the RHA, fly ash and the silica fume was also compared according to the method of absorption of the solution of the active mineral additive. It is established that the duration of the mechanical activation of rice husk ash by grinding in a vibratory mill is optimal for increasing its pozzolanic activity, since it simultaneously results in the production of the most dispersed ash particles with the highest specific surface area and maximum solubility of the amorphous silica contained in it. Longer grinding does not lead to further reduction in the size of ash particles, which can be explained by their aggregation, and also reduces the solubility of amorphous silica in an aqueous alkaline medium.

Desalination Technology of Water by using Rice Husk Ash

2014 ◽  
Vol 27 (2) ◽  
pp. 148-160
Author(s):  
Hassan K. Hassan ◽  
Najla J. Al-Amiri ◽  
Mohammed M. Yassen
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Desalination Technology
Sign in / Sign up

Export Citation Format

Share Document