Page 11 - Seminar Spesifikasi Piawai Geoteknik Section 16

DESCRIPTIONS OF CURRENT SECTION 16:2014

Ref. Standard Specification Content

Specification for

Road Works :
Section 16

16.4 Guniting 16.4.10 (b) Rebound hammer test has to be carried out on pre-construction test panels at

locations selected by the S.O. (at least 30 points). The Contractor has to redesign the mix
and change equipment or nozzleman if the results of any cube or any rebound hammer

test are below the specified strength shown on the drawing.

16.4.10 (e) Prior to spraying of gunite, the Contractor shall request inspection by the S.O.

and a photo (minimum one photo for every 300m2) shall be taken to show the thickness
markings. In addition to the markings, coring to check the thickness of gunite shall be

subsequently carried out. Coring (100mm diameter) shall at a rate of one core per 500m2

at locations selected by the S.O. for checking the thickness and quality of gunite
(void/honeycomb). The drilled holes shall be backfilled with dry-packed compressive (1:3)

mortar. Documental evidence by photo for each core shall be carried out. The S.O.

reserves the right to reject the gunite works if the thickness of gunite is found inadequate
or the gunite is found porous or low strength (less than the specified value). Further

coring (1 core per 200m2) shall be carried out at Contractor's own costs if defective works

are detected.