Study on Mechanical Properties of Light Weight Vermiculite Concrete by Partially Replacing Cement with GGBS and Dolomite

This research aims to determine the mechanical properties of light weight vermiculite concrete of M30 grade by partial replacement of cement with GGBS and Dolomite In this study two different concrete mixes were prepared with partial replacement of cement with 40% of GGBS and fine aggregate with varying proportions of vermiculite of 0%,5%, 10%,15%,20% and 25% and another set of concrete mixes were prepared with partial replacement of cement with dolomite of 30% and fine aggregate with varying proportions of vermiculite of 0%,5%,10%,15%,20% and 25%. Keywords: Vermiculite Concrete, Light Weight Concrete, GGBS, Dolomite, Mechanical Properties

Accommodating the multi-state constraint Kalman filter for visual-inertial navigation in a moving and stationary flight

For more than a decade, the multi-state constraint Kalman filter is used for visual-inertial navigation. Its advantages are the light-weight calculations, consistency, and similarity to the current mature GPS/INS Kalman filters. For using it in an airborne platform, an important deficiency exists. It diverges while the object stops moving. In this work, this deficiency is accounted for, by changing the state augmentation and measurement update policy from a time-based to horizontal travel-based scheme, and by reusing the oldest tracked point over and over. Besides the computational savings, it works infinitely with no extra errors in full-stops and with minor error build up in very low speeds.