Search

The efficiency of polyester and bamboo geogrids in reducing the seismic settlement of low-rise buildings has been investigated in this paper. A series of shake table experiments was carried out for this purpose. It was observed that the beneficial attributes of a rocking foundations in reducing the flexural deformation and column moment remained unchanged after inclusion of geogrids. However, the settlement, a primary adverse consequence of a rocking foundation, reduced significantly (as much as 70–75%). In a developing country like India, natural material-like bamboo threads combined with geo-polymers may be utilized for safe and sustainable seismic design. [ABSTRACT FROM AUTHOR]

Pavements constructed over poor subgrade soil will lead to rapid increase in construction and maintenance costs due to increase in crust thickness and frequent failure. In a developing country, like India, costs play a very significant role. In India, more than 20% of the land area is covered with soils having low California bearing ratio (CBR) and shear strength values. These soils consist of a substantial amount of fines; i.e., a high percent of silt and clay, losing significantly in strength upon coming in contact with water. This paper presents the effect of geogrid reinforcement on the strength behaviour of poor subgrade soil. The geogrids are placed in single and double layers from the top of mold and heavy compaction and soaked CBR tests are performed. It is observed that geogrid reinforcement increases the CBR value significantly, thus causing significant reductions in pavement thickness and cost. Multiple linear regression models were developed for predicting soaked CBR. [ABSTRACT FROM AUTHOR]