12758Re: [engineeringcivil] SOP IN CONSTRUCTION INDUSTRY
- Jun 11, 2014
M20 is a concrete having charecteristic compressive strength of 20N/sq.mm or more on 28th day. All of us agree to it.
But difference in opinion is on how to obtain it. There are two ways as approved by Indian standards. Firstly by mix design as per IS 10262 Second way is to use the nominal mix proposed by IS456:2000
Nominal mix for shall be proportioned as per table 9 of IS 456. As per table 9 of Is 456, Total quantity of aggregate is 250kg per 50kg of cement (1 bag ) Total aggregate can be proportioned in a ratio 1:1.5 to 1:2.5 (taken normally as 1:2) with maximum water content of 30l.
The minimum cement content and maximum free water cement ratio can be obtained from table 5 for the required exposure conditions and grade of concrete.
TEC Engineering & Contracting,
Punnala, Piravanthoor Via,
Kollam, Kerala, India
Mobile +91 9656840794On May 24, 2014 2:16 PM, "konvicted konvicted sanjay.konvict@... [engineeringcivil]" <firstname.lastname@example.org> wrote:You said how to calculate cement bag in ration...Sol : Lets take M20 : 1:1.5:3 , Vol. of Mixture - 1Cum3 is aggregate , 1.5 is Dust , 1 is cementLets do : 1+1.5+3 = 5.5Aggregate := (3/5.5)*1= 0.54 mtDust : (1.5/5.5)*1= 0.27Cement : = (1/5.5)*1= 0.18Now in cement we have to find out bagSo, Vol. of cement x Density / 50
Vol. of cement = 0.18Density = 1440So we do, =(0.18*1440) /50= 5.23 bagsInclude Wastage = 5%Aprrox 6 bags in 1 cum mixture of M20On Thu, May 15, 2014 at 10:10 AM, Safer Khan engr_safer50@... [engineeringcivil] <email@example.com> wrote:how to calculate the cement bags in this ratioOn Wednesday, May 14, 2014 11:44 AM, "Vaibhav Jadhav civil_vaibhav@... [engineeringcivil]" <firstname.lastname@example.org> wrote:M20: M= Mix Design20= characteristic comreive strength of concrete at 28 days of currring.M20 mix ratio is 1: 1.5: 3 contains 6.90 bags of cementOn Saturday, 10 May 2014 12:08 PM, "dhanush durai dhanushkodidurai@... [engineeringcivil]" <email@example.com> wrote:M20 mix ratio is 1: 1.5: 3 contains 8.64 bags of cementFrom: ROMAAN Mehboob <romaanmehboob@...>
Sent: Thursday, May 1, 2014 8:58 PM
Subject: Re: [engineeringcivil] SOP IN CONSTRUCTION INDUSTRYM20 is Grade of Concrete Means Mix ratio 20 is related strenth... M20 = 1:2:4 mix ratio. 1cum of M20 contains 6.22 bags of cement.On Thursday, April 17, 2014 11:27 PM, Safer Khan <engr_safer50@...> wrote:what is mean by M20 anyone can explain me--BR\\ CEO\\ SBSanins Infra Solution
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