## 12761Re: [engineeringcivil] SOP IN CONSTRUCTION INDUSTRY

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• Jun 16, 2014
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Very useful information. Thanks to every one.
Please can anybody let us know the quantity of sand and coarse aggregate in 1 cum of concrete. If suppose M20.

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On 12-Jun-2014, at 8:51 am, "Vaisakh Gopinadhan tec.cea@... [engineeringcivil]" <engineeringcivil@yahoogroups.com> wrote:

Hi
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.

Regards,
Principal Consultant,
TEC Engineering & Contracting,
Punnala, Piravanthoor Via,
Kollam, Kerala, India
http://vaisakhg.blogspot.com/
Mobile +91 9656840794

On May 24, 2014 2:16 PM, "konvicted konvicted sanjay.konvict@... [engineeringcivil]" <engineeringcivil@yahoogroups.com> wrote:

You said how to calculate cement bag in ration...

Sol : Lets take M20 : 1:1.5:3 , Vol. of Mixture - 1Cum

3 is aggregate , 1.5 is Dust , 1 is cement

Lets do : 1+1.5+3 = 5.5

Aggregate := (3/5.5)*1
= 0.54 mt
Dust : (1.5/5.5)*1
= 0.27
Cement : = (1/5.5)*1
= 0.18
Now in cement we have to find out bag

So, Vol. of cement x Density / 50

Vol. of cement = 0.18
Density = 1440

So we do,  =(0.18*1440) /50
= 5.23 bags

Include Wastage = 5%

Aprrox 6 bags in 1 cum mixture of M20

On Thu, May 15, 2014 at 10:10 AM, Safer Khan engr_safer50@... [engineeringcivil] wrote:

how to calculate the cement bags in this ratio

On Wednesday, May 14, 2014 11:44 AM, "Vaibhav Jadhav civil_vaibhav@... [engineeringcivil]" <engineeringcivil@yahoogroups.com> wrote:

M20: M= Mix Design
20= characteristic comreive strength of concrete at 28 days of currring.
M20 mix ratio is 1: 1.5: 3 contains 6.90 bags of cement
On Saturday, 10 May 2014 12:08 PM, "dhanush durai dhanushkodidurai@... [engineeringcivil]" <engineeringcivil@yahoogroups.com> wrote:

M20 mix ratio is 1: 1.5: 3 contains 8.64 bags of cement

From: ROMAAN Mehboob <romaanmehboob@...>
To: engineeringcivil@yahoogroups.com
Sent: Thursday, May 1, 2014 8:58 PM
Subject: Re: [engineeringcivil] SOP IN CONSTRUCTION INDUSTRY

M20 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
On Wednesday, April 2, 2014 7:20 PM, "aamit_69@..." <aamit_69@...> wrote:

WITH VERY SMALL PROJECT OF 50 TO 100 RESIDENTILA FLATS WANTS TO IMPLEMENTS SOP AND BENCHMARK THE QUALITY.

PL FWD THE SOP STANDARD OPERATING PROCEDURE / STD PRACTICES APPLICABLE IN THIS REGARDS

--
BR\\ CEO\\ SB
Sanins Infra Solution