concrete

  1. Ma7mood

    The Design of Prestressed Concrete Bridges Concepts and principles

    Get PDF of Design of Prestressed Concrete Bridges for free. Main Contents of Design of Prestressed Concrete Bridges - The nature of design. - Basic concepts. - Reinforced concrete. - Prestressed concrete. - Prestressing for statically determinate beams. - Prestressing for continuous beams. -...
  2. Arjunsingh

    Arjun Singh ( Sr. Quality Engineer )

    Hi, I am a Quality Engineer, having 12 years of Experience in reputed organizations like L&T, Simplex Infrastructure Limited, etc. I am here to share all of my experience with all construction engineers or students. To do this I created a website Home | Construction Test, where anyone can learn...
  3. dorydirect

    Answered What is the best mix ratio from cement / sand ( no hard aggregates) for thin castings such as bowls and planters

    Hello, After many tests, it seems that ANY combination of hard aggregates in my castings produces holes here and there which I try to prevent as much as possible. what is the best mix ratio from cement/sand ( no hard aggregates) for thin castings such as bowls and planters? I know that...
  4. rameshchandrapatel

    Answered Cutting methodology of rebars

    On one of my project's structural member, the Site Engineer In charge cut the rebar with gas torch cutter. The Quality manager immediately ordered the work to be stopped and issued NCR. What is the reason that rebars need to be cut with a rebar cutting machine and not gas torch cutter ? Need...
  5. Dnyan Deshmukh

    How GGBS used for replacing cement in concrete is Made inside Steel manufacturing Factory

    How GGBS is Made inside Steel manufacturing Factory On our planet, Iron is not found in pure state, we call it as ore. Iron Ores are often oxidized and mixed with Silicates (sand). During manufacturing of steel these ores are heated above 1600 degree centigrade in the furnace, there are many...
  6. rameshchandrapatel

    Concrete that traps CO₂ and actually makes it stronger

    Concrete is the most abundant man-made material in the world; it is the backbone of modern society. But cement, the critical ingredient that gives concrete its strength, is responsible for up to 7% of the world's carbon dioxide emissions. CarbonCure manufactures a bolt-on technology that...
  7. shubhamce2014

    10 Precautions to be taken during placing of Concrete

    10 Precautions to be taken during placing of Concrete Following precautions should be taken during placing of concrete. 1. The formwork or the surface which is to receive the fresh concrete should be properly cleaned, prepared and well watered. 2. It is desirable to deposit concrete as...
  8. Dqspathum

    Compressive Strength Test of Concrete Cubes

    The Compressive Strength of Cubic Concrete Specimens Compressive strength of concrete: Out of many test applied to the concrete, this is the utmost important which gives an idea about all the characteristics of concrete. By this single test one judge that whether Concreting has been done...
  9. Dnyan Deshmukh

    Slump Test for Concrete

    Slump Test for Concrete Ref : IS 1199 Purpose : To find out the workability of fresh concrete Salient features of apparatus: Slump Cone: Top diameter - 100 mm Bottom diameter - 200 mm Height - 300 mm Thickness - 1.6 mm Tamping rod: Diameter - 16 mm Length - 600 mm...
  10. Dnyan Deshmukh

    Compressive strength test for concrete

    Compressive strength test for concrete Ref : IS 516 Purpose : To find out the compressive strength of concrete Salient features of apparatus: Compression testing machine Specimen Test Procedure: Remove the cubes from water after curing period Place the...
  11. archdevil

    Presentation on Concrete Engineering

    Concrete is a composite material that essentially consists of a binding medium embedded with Fine-Aggregate (typically sand) and Coarse Aggregate (typically gravel) with or without chemical and mineral admixture. Concrete is neither as strong nor as tough as steel, so why is it the most widely...
  12. Srinivasan

    Special Types of concrete you can produce at your construction project

    Special Types of concrete you can produce at your construction project When it comes to a concrete, all might thought its just a mixture of cement, sand and aggregates. there is lot in the concrete that we can do, addition in ingredients and material properties gives concrete a different...
  13. Dnyan Deshmukh

    Become Concrete Master - Concrete Mix Designing

    Concrete is a material which is a basic for any project. I will be helping you out by sharing my experience with all of you (You too can help me in learning new tech's in this field by sharing your experience through doing post on forum). After reading all posts you will be in position to say...
  14. Dnyan Deshmukh

    Standard Deviation and Its Use in Concrete Mix Designing

    Standard deviation is a measure of the variation of concrete strength of a set of data from its mean. If the strength results are away from the mean, the deviation will be higher and vice a versa. Its a statistical measure for Re-designing the mix base on results achieved. In initial mix...
  15. Dnyan Deshmukh

    Why We do cure concrete by pouring water

    This is a common question, asked by many. We all have seen, Almost everyone working at project site, do insist to keep on curing by pouring water, wrapping concrete surface with hessian cloths etc. Do the poured water really increase the strength of concrete? What if, i dont cure concrete...
  16. Dnyan Deshmukh

    Gradation of Aggregates and its importance in Mix Designing

    Concrete mix designing is a vital part of any construction activity. Why we do mix design when proportions for material are listed in IS codes for various grades? The listed mixes have more cement content than required and have fix properties like workability, retention time etc. In order to...
  17. Srinivasan

    Specification for concrete work of high rise building

    Specification for concrete work of high rise building Concrete shall be transported and placed by approved methods that ensure segregation or loss of material will not occur. Concrete drop during vertical placement shall not exceed 2.5m. For heights greater than 2.5m, the Contractor shall pour...
  18. Dnyan Deshmukh

    What no one will tell you about rebound hammer test

    Rebound hammer test specifications are given in IS 13311 part 2 1992. Every one know about it and knows how to do rebound hammer test, many had gone through the IS codes, posts on blogs and some interview questions. One of my friend ask me, how i should do the rebound hammer test, as per IS...
  19. Srinivasan

    Properties of Cement Concrete

    Properties of Cement Concrete Properties of concrete are influenced by many factors mainly due to mix proportion of cement, sand, aggregates and water. Ratio of these materials control the various concrete properties which are discussed below. Properties of Concrete are Grades (M20, M25, M30...
  20. Chetan Yadav

    FB Troll In 1 cum how many number of 50kg cement bags required

    If You really Ask me, then let me tell you. The number of cement bags per cum of conrete depends on Your Concrete Mix Design. Mix Designing is done to achieve a specific characteristic of Concrete like compressive strength, durability etc. Characteristic of concrete depends on design of...