Concrete Slump Test | Civil Engineering Notes

This article is about Concrete Slump Test related to topic of Civil Engineering Construction Projects for Project in Building, Plants and Petrochemical Plants as per International Codes & Standards.

Concrete Slump Test

Purpose of Test:

To find out the consistency of contemporary concrete and to
test its uniformity from batch to batch. This take a look at relies on ASTM C 143:
Normal Technique of Check for Stoop of Portland Cement Concrete.
Take two or extra consultant samples — at often spaced intervals —
from the center of the mixer discharge; don’t take samples from starting or
finish of discharge. Acquire samples inside quarter-hour or much less. Vital: Stoop
take a look at should be made inside 5 minutes after taking samples.
Mix samples in a wheelbarrow or acceptable container and remix
earlier than making take a look at.
Dampen stoop cone with water and place it on a flat, stage, clean, moist,
non-absorbent, agency floor.

1. Stand on two foot items of cone
to carry it firmly in place throughout
Steps 1 via 4. Fill cone mildew
1/3 full by quantity [2½” (63.5mm)
high] with the concrete pattern and
rod it with 25 strokes utilizing a spherical,
bullet-nosed metal rod
5/8″ (16mm)
diameter × 24″ (61mm) lengthy.
Distribute rodding strokes evenly
over total cross part of the
concrete through the use of roughly
half the strokes close to the perimeter
(periphery) after which progressing
spirally towards the middle.

2. Fill cone 2/3 full by quantity [6″
(23mm) or half the height] and once more
rod 25 occasions with rod simply penetrating
into, however not by, the primary layer.
Distribute strokes evenly as described in
Step 1.

6. Place the metal rod horizontally
throughout the inverted mould so the rod
extends over the slumped concrete.
Instantly measure the space
from backside of the metal rod to the
authentic middle of the highest of the
specimen. This distance, to the
nearest 1/4 inch (6mm), is the
hunch of the concrete.

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