Cutting Paragraphs and Important Table of IS CODE 456 : 2000 (PART IV)

Contd.....

******TRANSPORTING, PLACING, COMPACTING AND CURING******

ABOUT CONSTRUCTION JOINTS

CURING OF CONCRETE;

**************CONCRETE UNDER SPECIAL CONDITIONS**************

***SAMPLING AND STRENGTH OF DESIGNED CONCRETE MIXED***

**************************ACCEPTANCE CRITERIA***********************

FOR COMPRESSIVE STRENGTH;

FOR FLEXURAL STRENGTH;

others;

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ABOUT STONES

The engineering structure are composed of material. These materials are known as the engineering materials or building materials or material of construction. it is necessary for an engineer to become conversant with the properties of such materials. The services conditions of building demand a wide range of materials and various properties such as water resistance, strength, durability, temperature resistance, appearance, permeability, etc. are to be properly studied before making final selection of any building material for a particular use. It is significant to note that a universal building material for application in all conditions is yet to be a found out. The grouping of building materials is done by considering specific properties of the materials such as stones, ceramics, cement concrete, timber, metals, etc. eaach group is then suitably sub-divided. The application of each building material in the engineering field is predetermined by its chief or main properties. When a...

IS 10262:2009 Guidelines for concrete mix design proportioning (WIth Design Mix Example)

IS 10262:2009 CONCRETE MIX PROPORTIONING – GUIDELINES DATA FOR MIX PROPORTIONING Grade designation; Type of cement Maximum nominal size of aggregate Minimum cement content Maximum water-cement ratio Workability Exposure condition as per table 4 and table 5 of IS 456 Maximum temperature of concrete at the time of placing Method of transporting and placing Early age strength requirement, if required Types of aggregate Maximum cement content Whether admixture shall or shall not be used and the type of admixture and the condition of use. 1. Target Strength of Mix Proportioning f ck ’ = f ck + 1.65s Where ; f ck ’ = Target mean compressive strength at 28 days in N/mm 2 f ck = Characteristic compressive strength at 28 days in N/mm 2 and s = Sta...

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Contd..... Electrical conduits shall not be run in columns. In soil filling as per IS code for every 100 m 3 sample for core cutting test should be taken. Free falling of the concrete is allowed maximum 1.5 m according to IS456 is the important aspect to considered because if the drop height is more than 1.5 m segregation would happen. Use of stirrups is to handle the shear force and hold the reinforcement bars in position.You are aware that concrete is good at compression and steel is good at tension, thus the combination of both corners the shear force. Aggregate used for concrete production should be less pores, in other words it should not absorb water more than recommendation by code's, usage of such aggregate would reduce strength by absorbing water from concrete. Strength of concrete is inversely proportional to water cement ratio. Even before the construction commences, it is essential to chec...

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