Lab Report bulk density for materials PDF

Preview

Summary

this is lab report during diploma year at universiti teknologi mara kampus jengka....

Description

CIVIL MATERIAL LABORATORY ECS 256 OPEN-ENDED LAB SEPT 2017 – JAN 2018 TITLE OF EXPERIMENT

: BULK DENSITY

DATE OF EXPERIMENT

:11/5/2018

GROUP GROUP MEMBERS

:EC110 4N 1. AHMAD ZULKAMAL B AHMAD MURAD 2. MOHD HARIZ HAZMIE B. MUHD FISOL 3. MUHAMMAD DARWISH BIN ZULKIFLI 4. NOR ARIENI SHAKIRAH BT RAMLI 5. NORSHASHA ADIRA BT SANA

LECTURER

: MADAM FADHLUHARTINI MUFTAH

LEVEL OF OPENESS

:

1

MARKS INTRODUCTION OBJECTIVE(S) METHODOLOGY RESULTS DISCUSSION CONCLUSION ORGANIZATION TOTAL MARKS

Introduction

CO3 PO9 CO3 PO9 CO3 PO9 CO3 PO9 CO4 PO9 CO4 PO9 CO4 PO9

2 2 2

4 4 4

6 6 6

COMMENTS

8 8 8

10 10 10

In this laboratory activity students will be exposed to the types of aggregate in order to determine the unit weight (bulk density) and voids aggregates. The group is required to carry out bulk density test following the procedures outline and subsequently analyze the data and present it in a proper technical format

Objective To determine the unit weight (bulk density) and voids aggregates.

Apparatus 1. weighing balance 2. weight box(metric) 3. sample splitter 4. cylinder containers (3,7,15 or 30 liters capacity) 5. shovel 6. tamping rod (16mm diameter and 60 cm long rounded at one end) 7. piece of glass plate

Procedure

Compact weight determination 1. The volume of container was determined to be used by accurately filling it with water at 16.7 Celsius and weigh the amount of water. The weight of water in kg will give the volume of container in filters. 2. Take the sample by quartering. 3. Filled the container with aggregates in three layers with each layer being tamped with 25 strokes of rounded end of the tamping rod, distributing the strokes evenly over the surface. The container is finally filled to overflowing. 4. Strik off the surplus aggregates using tamping rod as straight edge. 5. Weighted the container full of aggregates. 6. The net weight of aggregate was calculated in the container and compute the unit weight of aggregate in kg/litre by dividing the net weight of aggregate in the container by the volume of the container Loose weight determination 1. Filled the container to overflowing by means of a shovel. The aggregate being discharged from a height not exceeding 5 cm above the top of container. 2. Level off the surface of the aggregate using tamping rod as a straight edge. 3. The net weight of aggregate was determined in the container. 4. Computed the percentage of voids density in kg/litre

Data acquisition

Material and size of aggregate Wt. of empty container Wt. of empty container filled with water Volume of container Type of determine Weight of container + full of aggregate Weight of aggregate in container Bulk density of aggregate in Percentage of voids

mm kg kg

5 0.364 5.583

5 0.364 5.583

litre

5.219 Compact weight 7.682

5.219 Loose weight 7.025

kg Kg/litre %

7.318 1.402 47.49

6.688 1.282 51.99

Example of calculation Wt. of water = Wt. of empty filled with water – Wt. of empty container = 0.583 – 0.364 = 5.219 kg Volume of water = 5.219 / 1000 = 5.219 x 10-3m3

=5.219 L Weight of aggregate in container = weight of container + full of aggregate – weight of empty container =7.025 – 0.364 = 6.688 kg Bulk density of aggregate =

=

weight of aggregate volume of container 6.688 5.219

=1.282kg/L *assume that the specific gravity of aggregate is 2.67 Percentage of voids =

=

specific gravity−bulk density x 100 specific gravity 2.67 −1.402 x 100 2.67

=47.49 %

Result and analysis Based on the experiment, to find volume of water we used

v=

m ρ

and we get the value 5.219

Liter. weight of container + full of aggregate – weight of empty container is used to find the weight of aggregates and we obtained as 7.318 kg for compacted aggregate and for loose aggregates is 6.688 kg. the formula to find bulk density is

weight of aggregate . The bulk volume of container

density of aggregates for compact weight is 1.402 kg/L while for loose weight is 1.282 kg/L.

the percentage of voids for compacted is 47.49 % while for loose is 51.99% and we obtained it specific gravity−bulk density x 100 . specific gravity

using formula

Conclusion In conclusion, the bulk density of aggregates for compact weight is 1.402 kg/L while for loose weight is 1.282 kg/L. The percentage of voids for compacted aggregate is 47.49% and for loose aggregate is 51.99% References -

Madam Fadhluhartini Muftah  Lecturer Material UiTM Jengka

-

Books  Material for Civil and Construction Engineers (Fourth Edition in Si Units) by Michael S. Mamlouk and John P. Zaniewski

-

Internet  http://www.engineeringintro.com/concrete/concrete-strength/bulk-density-of-aggregateloose-and-compact-bulk-density/  http://civilblog.org/2015/01/09/how-to-test-aggregate-for-bulk-density-and-voids/...