Concrete materials are still a dominant material for construction due to its advantages suchas workability, low cost and fire resistance as well as its low maintenance cost. It is formed from a hardened mixture of cement, fine aggregate, coarse aggregate, water and some admixture. Massive exploration of the natural resources for producing concrete affect to the environment condition and global warning. We have responsibility to reduce the effect of the application of concrete materials to environmental impact. The concrete should be used as efficient as possible. Nowadays researches efforts are continuously looking for new, better and efficient construction method. Various theories related to the analysis of structural elements reduced the self-weight of element for a given load- carrying capacity. Structural material optimization can reduce the dead load which reduce the contribution of seismic effect in high rise structures and also very good at the vibration dampers and heat isolation.
According to the natural behaviour of the concrete, it is strong in compression and weak in tension. Our assumption to design the R.C beams is the contribution of tensile stress of the concrete is neglected. The
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In construction industries huge wastage in concrete occurs. Material cost is a main component in the total cost of the product varying from 25 to 70%. Therefore, in order to control the cost, it is necessary to pay maximum attention for controlling material cost especially through abnormal losses. It should be made sure that the right quantities of materials are consumed with less wastage. This issue can be minimized by avoiding concrete in the neutral axis without bearing significant strength. Saving of concrete can be efficiently achieved with increase in length and depth of the beam. Therefore it can be effectively utilized during the construction of plinth beams, raft foundation, piers and similar other
CHAPTER I THE PROBLEM AND ITS BACKGROUND Introduction Recent earthquakes, particularly the magnitude 6.2 Earthquake in Davao on February 16, 2013, the 5.7 Earthquake in Southern Mindanao on June 1, 2013 and the deadliest earthquake in the Philippines for the past 23 years, the magnitude 7.2 Earthquake in Bohol on October 15, 2013, have caused significant loss of life and severe damage to property. Many aseismic construction designs and technologies have been developed over the years in attempts to mitigate the effects of earthquakes on buildings and their vulnerable contents. Reducing the effects of severe ground motions on the buildings and their contents is always one of the most popular topics in the area of civil and structural Engineering
Name: VISHAL KADU Assignment No.: 4 Unit Name: Properties and Applications of Engineering Material Unit No.: 19 Task 1: Describe the principles of the modes of failure known as ductile/brittle fracture, fatigue and creep. a) Ductile/ brittle fractures: brittle material breaks easily when heavy force is applied on it. Ceramics and cements are the best examples of brittle fracture. Ductile fracture is better than brittle fracture, because ductile fracture occurs over a period of time, while brittle fracture is fast, and can take place at lower stress levels than a ductile fracture.
The column dimensions were 10 in. in the north-south direction (denoted as y-direction on the confined concrete column cross-section) and 15 in. in the east-west direction (denoted as x-direction on the confined concrete column cross-section). A concrete cover of 0.75 in. was used on all sides of the confined concrete column. Eight ASTM A706 Grade 60 #7 deformed steel bars were used for the longitudinal mild steel reinforcement bars inside the confined concrete of the column.
It requires lots of time and is labour-intensive. It contains a mixture of sand, cement, crushed rock, pebbles, and water. The main ingredient in concrete paving is, however, cement. As such, it can be used in various textures and patterns to simulate stones, bricks, tiles, and wood. Further, by mixing cement and pebbles, paving can also be done in the exposed aggregate concrete form.
The surface at which the concrete is supposed to be placed should be properly damped so that excess water is removed. Use of fibers or silica fumes can also help to reduce the crack formation. 5. Plastic Shrinkage in Shape of
The Roman Empire The use of concrete in Roman Architecture Introduction: Roma, Modern day Rome, was founded in 753 BC, by the first of the seven Roman Kings, Romulus. The Roman Empire was one of the most powerful civilizations in history. The Roman power was echoed in their buildings with large arches and vast interior spaces, which was possible through the use of concrete.
The farther apart its piers, the weaker the beam becomes. For this reason, bridges rarely span more than 250
I had first formal exposure to civil engineering in course “Architecture 1”. This course provided me the fundamental concepts of civil architectural principles such as designing procedure, architectural component’s layouts, functional spaces as well as environmental impacts. To strengthen my concepts I pursued the courses “Strength of Materials”, “Structural Mechanics” which gave me essential knowledge about the external and internal forces occuring in simple structural elements under action of various types of loading as well as fundamental concepts in structural analysis such as modellisation, classification of structures. I gained valuable exposure to the analysis of simple structures submitted to compound loadings by the application of the principle of superposition for such cases as: unsymmetric bending, combined bending and tension or compression, combined bending and torsion, general compound loading. Futhermore, I was fascinated by the force method and displacement method for analysis of statically and kinetically indeterminate structures.
Introduction In today’s world, most developing countries are in a race to build up the necessary infrastructure to scale up there operations and become the next global superpower. In this process, a lot of energy is consumed – be it for transportation, manufacturing or construction. This rapid growth of energy use seen over the past two decades have raised concerns for governments and energy-related organizations alike. Questions with regard to the supply, sustainability and exhaustion of energy sources abound, and while most developed countries have taken active steps to reduce consumption of scarce resources, the position of developing countries in this regard is still lacking.
Statement of Purpose In today’s era of rapid infrastructure development in India, civil engineering will play a major role in changing the face of Indian panorama. Structural engineering is heart of civil engineering, the knowledge and technical skills of structural engineers to make architects vision work and turn their creativity into reality excites me. The Bhuj earthquake in 2001 killed 20,023 people, injured another 167,000 and destroyed nearly 400,000 homes. As buildings were designed for gravity loads only there was a need to design sustainable structures with seismic loads by structural engineers.
After that, descriptions of serviceability, limit state, bar anchorage, and lap lengths in structural analysis are explained. In this chapter will also discuss on reinforced concrete beam including comparisons design principle based on BS 8110 and EC2. At the end of this chapter briefly mention about the findings from previous studies which will focus on the parameters differences of serviceability, limit state, bar anchorage, and lap lengths based on BS 8110 and EC
Each pillar’s moment of inertia depends on the dimensions given, that is, the width and height. 3. The capacity of load carrying of a pillar depends on a number of issues, among them the material from which the columns are made. As he bridges are made of concrete columns, they tend to be superior and stronger. Their average strength ranges between 15 MPa and 100 MPa.
Decorative Choices For Your New Concrete Driveway If you 're tired of the maintenance needs of a dirt or gravel driveway, then it 's time to consider installing something more permanent. One option is concrete. Concrete driveways are durable and they can be stylish too. You generally have more options with concrete than you do with asphalt since concrete is lighter in color and can be dyed easily.
Introduction The development of concrete and arches in Ancient Rome added to Rome’s reputation as a practical and rich empire ahead of its contemporaries. Romans used concrete and arches to improve their architecture, their sanitation, their defense, and their roads. Development of Concrete Opus caementicium, or Roman concrete was first developed in the early second century B.C.E (Cartwright, 2013). The concrete of the Ancient Romans was developed from the chocolate colored volcanic earth named pozzolana found near Puteoli and discovered around Rome(Ambler, n.d., Cartwright,2013).
Cracks are expected at intervals in this slab (Usually .90 to 1.2m) and are held together with structural steel. Appropriate spacing between cracks must be determined in order for this method to work. Continuously reinforced roads can sometimes be more expensive than the other two methods due to the higher quality of steel used in its construction, however this can be lowered by the reduced amount of cement used in the concrete mixture due to the thinner layer of concrete in comparison with the other two methods. With proper management, this method can be similar to the other two in terms of durability and cost