strength procedure report

8/11/2019 Strength Procedure Report

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COMPRESSIVE STRENGTH OF ROCK CORESPir-Panjal _VB Railway Project

Location: PP_VB Rail Project- Tunnel Face.

Test location: VB QA/QC - Laboratory.

! SCOPE

This test etho! sets out the "roce!ure #or !eterinin$ the co"ressi%e stren$th o#

Roc&/concrete cores 'hich ha%e been ta&en #ro Roc&/har!ene! concrete.

"! #PP#R#T$S #N% E&$IPMENT

(a) Co"ression Testin$ *achine con#orin$ to the re+uireents o# ,: 010.

(b) 2ilti 33-455 Core 3rillin$ 'ith 55 3iaon! Core !ia bit.

(c) A !iaon! sa' *achine o# a least 15 !ia.cuttin$ bla!e.

(!) 3rillin$ bit 6 3ia 'ith !rillin$ achine

(e) ul"hur heatin$ "ot 'ith therostatic control.

(#) Vernier 7ua$e.

($) ul"hur Ca"in$ Co"oun!.

($) et o# Ca"in$

(i) Le%elin$ instruents 8 9ei$hin$ balance.

'! C#PING OF SPECIMENS

The en! o# the s"ecien that are not "lane 'ithin 5.51 shall be ca""e!.Ca"in$ sur#ace shall not be !e"a

#ro the "lane by ore than 5.51 8 shall be a""roiately at ri$ht an$le to the ais o# the s"ecien.Th

"laneness o# the ca" shall be chec&e! by ean o# strai$ht e!$e an! #eeler $ua$e a&in$ a iniu thre

easureent o# !i##erent !iaeters 8 len$th.

'! M#TERI#( FOR C#PPING

(a) ul"hur

(b) ;eat Ceent

(c) 2ar! Plaster

'!" Proce)*re

(a) <tract the core #ro the slecte! location an! cut it in a suitable !iension by cuttin$ sa' achine.

(b) 2eat the sul"hur in the "ot to a suitable %iscosity #or ca""in$.

(c) Reo%e all loose "articles an! laitance #ro the en!s o# the core 'ith a 'irebrush= an! ensure that the

en!s o# the core are !ry= by !ryin$ in #ront o# a current o# 'ar air i# necessary.



(!) Pour enou$h olten sul"hur iture into the base o# the ca""in$ !e%ice to #or a co"lete layer acros

the botto.

(e) Place an! hol! the core to be ca""e! #irly a$ainst the $ui!e "lates o# the !e%ice an! allo' it to sli!

slo'ly !o'n into the sul"hur.

(#) 2ol! the core in "osition until the sul"hur has set= then reo%e the base #ro the ca" 'ith a shar" blo'

'hile hol!in$ the core sli$htly abo%e the bench le%el.

+! #CCEPT#NCE OF SPECIMENS

A core 'hich be#ore ca"in$ has ainiu hei$ht o# less than >1 ? o# the !iaeter or a#ter ca"in$= a hei$

less than its !iaeter shall not be teste!.

,! COMPRESSIVE STRENGTH TEST PROCE%$RE

(a) *easure an! recor! the !iaeter an! hei$ht o# each s"ecien= the !iaeter bein$ the ean o# t'

!iaeters at ri$ht an$les to each other near the centre o# the len$th o# the s"ecien= the easureents bein

a!e to the nearest 5.1 . The hei$ht is to be easure! o%er the #ull !iension inclu!in$ the ca"s to th

nearest 4 .

(b) Clean the "latens o# the testin$ achine 'ith clean ra$ 'hene%er necessary= a&in$ sure that the sur#ac

are #ree #ro #ils o# oil or other lubricatin$ aterials an! "articles o# $rit.

(#) Clean the bearin$ sur#aces o# the s"eciens= a&in$ sure that they are #ree #ro oil an! "articles o# $rit.

($) Place the s"ecien in the achine= ali$nin$ the ais o# the s"ecien 'ith the centre o# thrust o# th

s"herically-seate! "laten.

(h) Brin$ the u""er "laten into contact 'ith the to" o# the s"ecien so that uni#or bearin$ is obtaine!.

(i) A""ly the loa!= 'ithout shoc&= increasin$ the loa! until the core s"ecien brea&= Recor! the aiu loa!

a""lie! to the s"ecien at #ailure.

! C#(C$(#TIONS

(a) The easure! co"ressi%e stren$th o# the s"ecien shall be calculate! by !i%i!in$ the aiu loa!

a""lie! to the s"ecien !urin$ test by the cross sectional area calculate! #ro the ean !iaeter o# the core

#n E.a/0le1

3iaeter: > = Len$th: 4.0

Brea&in$ Loa!: 15 @;

The 3ensity o# cylin!rical "ecien: 3ensity *ass/Volue

Volue r4h/

Co/0re22i3e 2tren4t5: Loa!/cross sectional area

Area 3/(.4>>/) 6>5.6D0 4

Loa! 15 &;



tren$th 15/6>5.6D0 555

4.6 "a.

Correcte! Core tren$th (,: 16) #i$-

9here as correction #actor: 5.>0

4.65.>0>.0"a

<+ui%alent Cube Co"ressi%e stren$th

Correcte! stren$th .41 .41E>.04.05 "a

Correction Factor 6IS1 ,7 8i4-

9! RECOR%S

Recor! the #ollo'in$ in#oration concernin$ each test s"ecien.

(i) ,!enti#ication o# core.

(ii) 3ate o# test.

(iii) 3iensions o# core.

(%ii) Any !e#ects in the core be#ore testin$.

(%iii) Len$th/!iaeter ratio o# core.



(i) Loa! at #ailure.

() *easure! co"ressi%e stren$th= calculate! to the nearest 5.1 *Pa.

(i) Ty"e o# #racture= i# unusual.

(ii) Any !e#ects in the ca"s or the core #oun! a#ter testin$.

Te2tin4 E3i)ence1

strength procedure report

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