Facultyhttp://dyuthi.cusat.ac.in:8080/xmlui/handle/purl/43032024-02-07T20:22:02Z2024-02-07T20:22:02ZMechanical Properties of Rice Husk Ash (RHA) - High strength ConcreteDeepa, Nair GSivaraman, KJob, Thomashttp://dyuthi.cusat.ac.in:8080/xmlui/handle/purl/46432014-08-19T20:30:31Z2013-01-01T00:00:00ZMechanical Properties of Rice Husk Ash (RHA) - High strength Concrete
Deepa, Nair G; Sivaraman, K; Job, Thomas
High strength and high performance concrete are being widely used all over the world. Most of the applications of high strength concrete have been found in high rise buildings, long span bridges etc. The potential of rice husk ash as a cement replacement material is well established .Earlier researches showed an improvement in mechanical properties of high strength concrete with finely ground RHA as a partial cement replacement material. A review of literature urges the need for optimizing the replacement level of cement with RHA for improved mechanical properties at optimum water binder ratio. This paper discusses the mechanical properties of RHA- High strength concrete at optimized conditions
American Journal of Engineering Research (AJER),Volume-3 pp-14-19
2013-01-01T00:00:00ZReactive pozzolanas from rice husk ash: An alternative to cement for rural housingDeepa, Nair GJagadish, K SAlex, Fraaijhttp://dyuthi.cusat.ac.in:8080/xmlui/handle/purl/46422014-08-19T20:30:29Z2006-03-01T00:00:00ZReactive pozzolanas from rice husk ash: An alternative to cement for rural housing
Deepa, Nair G; Jagadish, K S; Alex, Fraaij
This paper discusses the properties of rice husk ash samples produced from different types of field ovens to compare the performance of the
ovens and to identify the most feasible method to produce a reactive pozzolana as an alternative to cement for building applications requiring
lower strengths. Different types of ashes are produced and long-term strength of rice husk ash pozzolanas with lime or cement is investigated to
suggest a sustainable affordable option in rural building applications, especially for rural housing in Kerala, a southern state of India
Cement and Concrete Research 36 (2006) 1062–1071
2006-03-01T00:00:00ZA structural investigation relating to the pozzolanic activity of rice husk ashesDeepa, Nair GAlex, FraaijAdri, Klaassen A KArno, Kentgens P Mhttp://dyuthi.cusat.ac.in:8080/xmlui/handle/purl/46412014-08-19T20:30:30Z2008-01-01T00:00:00ZA structural investigation relating to the pozzolanic activity of rice husk ashes
Deepa, Nair G; Alex, Fraaij; Adri, Klaassen A K; Arno, Kentgens P M
Various factors determine the applicability of rice husk ash (RHA) as a pozzolanic material. The amount and accessibility of reactive sites is
thought to be a key factor. A structural study of RHA samples in relation to their reactivity has been performed; Silica in RHA formed by burning
rice husk in a laboratory furnace under continuous supply of air have been characterized as a function of incineration temperature, time and
cooling regime. The characterization methods included chemical analyses, conductivity measurements, microscopic analysis, X-ray diffraction
(XRD) and 29Si magic-angle spinning (MAS) nuclear magnetic resonance (NMR). In line with earlier observations, the analyses show that the
highest amounts of amorphous silica occur in samples burnt in the range of 500 °C–700 °C. The 29Si NMR data allow direct identification of the
reactive silanol sites in the RHA samples. De-convolution of the NMR spectra clearly shows that the quickly cooled RHA resulting from burning
rice husk for 12 h at 500 °C has the highest amount of silanol groups. This sample also induced the largest drop in conductivity when added to a
saturated calcium hydroxide solution giving an indication of its reactivity towards lime. Therefore, this RHA is the favorable sample to be used as
pozzolanic cement additive
Cement and Concrete Research 38 (2008) 861–869
2008-01-01T00:00:00ZInteractive comment on “Experimental study using coir geotextiles in watershed managementSubha, Vhttp://dyuthi.cusat.ac.in:8080/xmlui/handle/purl/46392014-08-19T20:30:30Z2006-02-01T00:00:00ZInteractive comment on “Experimental study using coir geotextiles in watershed management
Subha, V
This paper presents the results of a field experiment conducted in Kerala,
South India, to test the effectiveness of coir geotextiles for embankment protection.
The results reveal that treatment with geotextile in combination with grass is an effective
eco-hydrological measure to protect steep slopes from erosion. In the context
of sustainable watershed management, coir is a cheap and locally available material
that can be used to strengthen traditional earthen bunds or protect the banks of village
ponds from erosion. Particularly in developing countries, where coir is abundantly
available and textiles can be produced by small-scale industry, this is an attractive alternative
for conventional methods. The paper analyses the performance of different
treatments with regard to soil moisture content, protection against erosion and biomass
production
Interactive comment on Hydrology and Earth System Sciences Discussions, 2, 2327, 2005.
2006-02-01T00:00:00Z