The Civil Engineering website
Between 2030 and 2050, it’s estimated that our planet will suffer devastating environmental losses. These could be due to population growth, climate change, and other environmental factors. In short, all the planet’s natural resources could be depleted by the end of this century. And this is why sustainable practices are so important. To help with … Read more
Masonry Wall – Types, Failure Mechanisms & Advantages Submitted By-Bhawnesh Kuldeep The masonry walls is built of individual blocks of materials such as stone, brick, concrete, hollow blocks, cellular concrete etc., usually in horizontal courses cemented together with some form of mortar. Advantages Of Masonry Wall The use brick and stone can increase the thermal … Read more
Sikkim Earthquake Of 14 February 2006 Moderate earthquake (reported as Mw 5.3 by USGS and as ML 5.7 by IMD) occurred in the state of Sikkim (India) on February 14 2006 at 06:25:23 a.m. local time. At 27.35°N 88.35°E, near Ralang (South Sikkim), with a focal depth of 30 km (www.usgs.gov) At 27.7°N 88.8°E, near … Read more
Guidelines to Construct Joints in Concrete Joints are to be carefully designed and appropriately constructed in order to avoid uncontrolled cracking of concrete slab. The following are recommended practices that should be observed: The maximum joint spacing should be 24 to 36 times the thickness of the slab. As an example, in a 5-inch thick … Read more
Grading Of Aggregates for Concrete Aggregate comprises about 85 % volume of mass concrete Concrete contains aggregate upto a maximum size of 150 mm Way particles of aggregate fit together in the mix, as influenced by the gradation, shape, and surface texture Grading effects workability and finishing characteristic of fresh concrete, consequently the properties of … Read more
Steps Involved in Mix Proportioning as per IS 10262:2009 (with solved example) General Steps Involved in Mix Proportioning Step 1. Choice of Slump Stiffest possible consistency that can be easily placed and compacted without segregation Pumping are typically designed for 100 mm to 150 mm slump Step 2. Choice of Max. Size of Aggregate … Read more
IS Codes Used In Mix Proportioning IS 456 : 2000 Code of Practice for Plain & Reinforced Concrete Exposure Conditions Table 5 – Minimum Cement Content & Max. w/c ratio IS 10262: 2009 Mix Proportioning – Guidelines Table 1 – Standard Deviation Table 2 – Max. Water Content Table 3 – Vol. fraction of Coarse … Read more
General Considerations for Workability of Concrete Workability Workability represents consistency & cohesiveness of concrete General Considerations for Workability Water content The higher the water content, the higher will be the fluidity of concrete, which is one of the important factors affecting workability. a/c Ratio The higher the aggregate/cement ratio, the leaner is the concrete In … Read more
Mix Proportioning & Strands of Mix Design Mix Proportioning Concrete Mix Proportioning is the science of deciding relative proportions of ingredients of concrete, to achieve the desired properties in the most economical way. Strands Of Proportioning Absolute Volume Methods IS Method ACI Method Road Note No. 4 Method DOE Method Weight Methods USBR Method Trial … Read more