Building a Green Future – Green Buildings

Building a Green Future – Green Buildings Green Buildings, Finding ways to stimulate demand for new, more environmentally friendly buildings, power facilities and factories will deliver significant environmental benefits. At the same time, investing in new public infrastructure will ease pollution-causing traffic congestion and ensure safe and healthy supplies of drinking water for decades to … Read more

Concrete, Masonry Construction and Formwork

Concrete, Masonry Construction, and Formwork This section sets forth the requirements for concrete, masonry construction, and formwork. It specifically addresses plant and equipment, concrete conveyance systems, reinforcing steel, surface preparation, formwork and falsework, vertical shoring, tubular welded frame shoring, tube and coupler shoring, single-post shores, vertical slip forms, releasing and moving forms, precast concrete, lift-slab, … Read more

Causes, Evaluation and Repair of Cracks in Concrete

Causes, Evaluation and Repair of Cracks in Concrete Cracks in concrete have many causes. They may affect appearance only, or they may indicate significant structural distress or a lack of durability. Cracks may represent the total extent of the damage or they may point to the problems of greater magnitude. Their significance depends on the … Read more

Concrete Properties and Mix Design | Mix Proportioning

Mix Design

Performance-Based Concrete Pavement Mix Design System Mix Design? It is the process of determining required and specifiable characteristics of a concrete mixture. Prescriptive approach (limits on materials). Performance approach (desirable characteristics). Mix design requirements are based on intended use, environment, etc.Mix design is the process of determining the quantities of concrete ingredients that meet the … Read more

Concrete Mix Design (Journal Paper)

Concrete Mix Design

Concrete Mix Design There are many methods of concrete mix design. But the British or American methods will not be applicable for our country, as the specific relationships constituting figures and tables are based on their materials. The IS 10262 recommends procedure for designing concrete mixes for general types of construction using the concreting materials … Read more

Unbonded Post-Tensioning System Technology in Building Construction

Unbonded monostrand tendon

Unbonded Post-Tensioning System Technology in Building Construction Introduction During the last three decades, unbonded post-tensioning has progressively become the predominant construction choice for commercial concrete buildings in the United States. The utilization of unbonded tendons is now standard practice for concrete structures. Because of their excellent performance record and their economical and versatile application, the … Read more

Concrete and the Environment

Concrete and the Environment There is increasing concern now that the choice of construction materials must also be governed by ecological considerations. At the beginning of the 20th Century, the world population was 1.5 billion; by the end of the 20th Century it had risen to 6 billion. Considering that it took 10,000 years after … Read more

Guide to Concrete Repair

conc_repair

Guide to Concrete Repair Concrete repairs have occurred on Reclamation projects since the first construction concrete was placed in 1903. Unfortunately, even though the best available materials were used, many repair failures have occurred during the 90 years since that first concrete construction. In evaluating the causes of these failures, it was learned that it … Read more