New M.Tech. Thesis Submitted from Civil

Durability Properties of Self Compacting Concrete with Recycled Aggregate and Silica Fume by Mohd Ishfaq 

Abstract

Concrete is widely used construction materials. As we know, it is a mixture of coarse aggre-gates, fine aggregates, binded together by cement with addition of water. Concrete which is highly flow able and can fill the form work under its own weight, consolidates without any mechanical vibration is known as selfcompacting concrete, thus cause self-compaction. Such concrete accelerate the time of placement, reduce the labour work needed for consolidation, finishing and reduces environmental pollution. The so called first generation SCC is used mainly for repair applications and in restricted areas where it is not possible to reach easily, comprising sections that present limited access to vibrate. It has been used in applications justifying the higher material and quality control cost when considering the simplified placement and handling requirements of the concrete. Silica fume is one of the best improvements of the rheological as well as the mechanical and good chemical properties. It also improves the dura-bility of the concrete. In this present study, tests on replacement of coarse aggregates with recycled aggregates and replacement of silica fumes with cement had been done. Tests were conducted for fresh prop-erties of self compacting concrete, i.e. filling ability, passing ability, segregation resistance, so as for obtaining fresh properties according to SCC EFNARC 2002 concrete mix. The different durability properties such as chloride penetration depth, abrasion resistance, were determined on various concrete mixes. Their compressive strength was also found. Replacement by silica fume decreases chloride penetration depth, depth of wear. Concrete mix having 50% recycled aggregate and 10% silica fume replacement had comparable durability in term of the chloride depth, abrasion resistance.

New M.Tech. Thesis Submitted from Civil

INFLUENCE OF NANO-SILICA AND GROUND GRANULATED BLAST FURNACE SLAG ON CEMENT USING STATISTICAL DESIGN OF EXPERIMENT by Arvinder Singh 

Abstract

Cement and concrete have been subjected to modification in earlier research works for the enhancement in its properties. However investigating the properties of concrete at nano-level is a comparatively new concept and nanotechnology can be applied to Civil Engineering by various concepts including addition of nanomaterials like Nano-Silica. On the other hand, use of waste materials as a replacement of cement is the need of the hour and the waste materials like furnace slag does possess cementetious character. This study was performed to study the effect of addition of Nano-Silica (Nano-SiO2) (0 - 3% by weight of cement) and waste material Ground Granulated Blast Furnace Slag (GGBS) (25 – 65% by weight of cement) on the physical properties of cement like Standard Consistency, Setting times, Compressive Strength at the ages of 7, 28 days. For structuring and analyzing the experiment, the Factorial design approach was adopted. From the study it was observed that addition of even small amount of Nano-Silica can drastically change the characteristics of cement like increase in the early age strength by 15% for 3% Nano-Silica replacement due to the acceleration of hydration of cement, but it also caused the increase in consistency limit from 28% to 31%. The setting times were also drastically reduced with addition of Nano-Silica. GGBS addition however resulted in slowed the hydration reaction, decrease in strength gain and water requirement due to its low hydraulic reactivity. However, by adding GGBS alongwith Nano-Silica it restricted the drastic drop in setting times of cement and also resulted in increased compressive strength by 11% at 2% Nano-Silica and 45% GGBS replacement due to the consumption of Ca(OH)2 and formation of additional C-S-H by both Nano-Silica and GGBS. Beyond the range 2% Nano-Silica and 45% GGBS the strength reduction was noticed probably due the decrease in the available free lime concentration at high concentrations of Nano-Silica and GGBS. The analysis of above experiment was carried out using factorial design of experiment, ANOVA was adopted for analysis of the 28-day Compressive strength which gave the result that Nano-Silica had more profound effect on strength of cement. Regression analysis was adopted to derive a relationship between the compressive strength of cement and different proportions of Nano-Silica and GGBS.

New M.Tech. Thesis Submitted from Civil

THE EFFECTS OF REPLACEMENT OF CEMENT AND SAND IN CONCRETE BY MARBLE POWDER by Himanshu Sharma

Abstract

Marble powder (MP) is a fine powder, formed as a waste product of marble sawing and shaping and can not be recycled due to problems that effects the environment. There is a possibility of using marble powder as partial replacement of cement and sand in concrete mix. In this study, the possibility of using marble powder in cement and concrete production was examined by studying the effects of blending the marble powder with cement and sand and checking the physical properties of fresh and hardened concrete. In studying the performance of concrete, a total of eighteen concrete mixes were prepared with replacement of cement and sand with marble powder ranging from 5% to 20% at an increment of 5% by weight. For each replacement value, two classes of concrete, M-35 and M-40, mixes were prepared for both cement and sand replacement cases. The investigation indicates that replacement of cement by marble waste powder for 5% value, in concrete production, results increase in comparable compressive strength as of concrete specimens without marble powder with slight slump reduction for both M-35 and M-40 classes. Increment of replacement beyond 15%, in concrete production, results in reduction of compressive strength and slump. Replacement of sand by marble powder from 5-20% , in concrete production, results in similar and mostly enhanced performance than the control concrete specimens; with slightl increase in compressive strength and slight slump improvement in both mixes. The Split tensile strength of Cylinders are increasing with addition of marble powder up to 15% when replaced by weight of cement and after that addition of waste marble powder it decreases the Split tensile strength .

New M.Tech. Thesis Submitted from Computer Science

DEVELOPMENT OF MOBILE APPLICATION FOR ROUTE NAVIGATION by Vandana Toor 

Abstract

Rоuting is оnе оf оur basiс aсtivity that wе pеrfоrm in оur еvеryday lifе, whеthеr it’s abоut tо rеaсh thе оffiсе whеrе wе wоrk frоm hоmе, tо gо fоr sоmе party in еvеning frоm hоmе. Hеrе basiсally is fосusеd rоuting frоm sоurсе tо dеstinatiоn. Sоurсе pоint is thе pоint frоm whеrе wе start and dеstinatiоn pоint is whеrе wе stоp. This thеsis wоrk is abоut dеvеlоping a mоbilе appliсatiоn fоr rоutе traсking using оpеn sоurсе data. Thе widеsprеad usе оf оpеn sоurсе prоjесt is duе tо thе faсt that it is еxpandablе, еditablе and usеablе frееly, withоut any сhargеs impоsеd. It is tоtally frее оf сhargеs. A numbеr оf оpеn sоurсе maps arе usеd hеrе and diffеrеnt typеs оf vеhiсlеs fоr thе usеrs tо traсk rоutе arе madе whiсh is gеnеratеd fоr thе sеlесtеd pоints. Fеw mоrе additiоnal fеaturеs arе prоvidеd fоr thе usеr likе tоtal timе and distanсе fоr thе rоutе it traсks, instruсtiоns tо rеaсh thе еnd pоint, еtс. This appliсatiоn has twо divisiоns, оnе is tеxtual and thе оthеr is graphiсal whеrе maps arе shоwn. Usеr сan prоvidе input by writing dоwn thе rеquirеd pоints in thе tеxt fiеlds оr it сan usе maps fоr prоviding input, i.е. by сliсking оn thе map frоm whеrе thе usеr dеsirеs tо find thе rоutе. Turn by turn API оf mapzеn is usеd tо makе this appliсatiоn wоrk. Сliеnt-sеrvеr arсhitесturе is usеd tо dеvеlоp this appliсatiоn. Оn thе сliеnt sidе wе havе usеd JS. Apaсhе Соrdоva appliсatiоn dеvеlоpmеnt framеwоrk is usеd tо dеvеlоp this wоrk intо mоbilе appliсatiоn. This framеwоrk is vеry еasy tо usе, оnly fеw instruсtiоns arе rеquirеd tо bе еxесutеd and yоu arе dоnе with dеvеlоping yоur wоrk intо mоbilе appliсatiоn. An andrоid-basеd mоbilе appliсatiоn is bеing dеvеlоpеd but this framеwоrk сan dеvеlоp mоbilе appliсatiоns fоr оthеr оpеrating systеms tоо. This appliсatiоn is еasy tо usе and its оutput is undеrstandablе fоr еvеryоnе. This is an оnlinе mоbilе appliсatiоn.