Pan U day #1

Mon (7/1)
-first day in the company
-learnt the few types of grade code for Pan United's products;
N - normal mix
P - pump mix
D - dry pile mix
T - tremie mix (found by research that tremie mix is for underwater placement of concrete)

-learnt about different types of lightweight concrete aggregate substitution material
Mesalite -
SiO2 - 69.9%
Al2O3 - 15%
Fe2O3+FeO - 5.05%
MgO - 1.93%
CaO - 3.1%
Na2O - 1.4%
K2O - 2.62%
Ig.Loss - 0.2%
(from http://www.genryo.co.jp/mesalite_e.htm) - believed to have come from Japan

-learnt of tests carried out on concrete for quality checks:
-Petrography - a test that covers almost everything; samples are made with high precisions to micrometer thickness for inspection under microscope

-Speedy moisture test for fine aggregate - took a video of the test

-trial mix for copper slag concrete