Bricks used for construction should be of good quality.Good quality of bricks shall have following properties 1. Good compressive strength 2. Low efflorescence 3. Uniform size, shape and colour 4. Low water absorption 5. evenness of baking Unless used for load bearing structures, following quick site test generally used to check the quality of bricks. 5
Curing of concrete – an introduction Presence of water is important to complete chemical reaction between cement and water. The setting and hardening of concrete largely depends on presence of water for hydration process. While mixing the required quantity of water is generally added to concrete ingredient and theoretically no additional water is required.
Physical properties of 53 grade cement as per IS 12269 Portland cements are commonly characterized by their physical properties for quality control purposes. Their physical properties can be used to classify and compare Portland cements. The challenge in physical property characterization is to develop physical tests that can satisfactorily characterize key parameters. IS 12269 describes
Selecting right type of concrete pump using nomograph One of the major requirement of concrete pumping is to find out suitable pump for particular job. For right type of pump selection using nomograph, following information should be known 1.Require voulme of concrete to be delivered in hours (Cumtr / Hr) 2.Internal diamtere of pipe line
8 steps guide to determine the initial and the final setting time of cement as per IS: 4031 (Part 5) Materials and apparatus required : 1. Vicat apparatus conforming to IS: 5513 2. Balance, whose permissible variation at a load of 1000 gms should be +1.0 gm 3. Gauging trowel conforming to IS: 10086 4.
The building material “concrete” has the vastest utilization world wide. The performance of concrete have continuously rise in order to accomplish the society needs. This fact leads to obtaining an economic cost of product on short and long periods. Thus an innovative concrete “self compacting concrete” was found that does not require vibration for placing
High quality and durable concrete is required to reduce the rapid deterioration of concrete in severe conditions. This paper reports the results of a study conducted to evaluate the performance of different types of Pakistani cements exposed to various aggressive sulfate and chloride environments. Mortar and concrete (plain and embedded with reinforcing steel) specimens were
Typically lap joints are provided to connecting reinforcement bars for continuity in reinforced. Though this is simple and easy method, it is not always appropriate OR feasible. Advantages of simplicity and economy in lap splicing is limited to smaller diameter bars. However in projects where larger diameter bars are involved, mechanical couplers offer the solution
What is bar bending schedule Bar bending schedule is used to give information about the design requirement of reinforcement steel to fitter (steel fabricator) and site execution team. Before actual steel cutting starts, bar bending schedule is to be prepare and get it approved from engineer in charge. Bar bending schedule give information about Dia
Seismic isolation is a good concept in earthquake engineering, having been introduced in the early 1980s in the USA and New Zealand, and as early as 1975 in the former Soviet Union. Quite simply, the idea underlying the technology is to detach the building from the ground in such a way that the earthquake motions
