Curing System for Mat-foundation

CURING SYSTEM FOR MAT-FOUNDATION

ICON COMPLEX PROJECT

CONCRETING TOWER I

Casting Mat Foundation for Tower I • PP divided into 3 (three) zone for pouring the Mat

Foundation; Zone 3 – Zone 4 – Zone 7 • Total Area for Tower I : 5.554,6 m2 • Mat Foundation thickness : 4,1 m

• Zone 3 : had been poured started from June 20th 2015 until June 21st 2015 (10.00 A.M – 11.00 PM)

• Total Volume for Zone 3 : 5.765 m3 • Zone 4 : had been poured started from July 02nd

2015 until July 04th 2015 (11.00 PM – 12.00 AM) • Total Volume for Zone 4 : 6.563 m3

4,1 M

• Zone 7 : still on progress preparation

THERMOCOUPLE

Thermocouple Plan for Tower I • For Tower I, should be provided 25 (twenty five)

thermocouple for controlling the temperature of concrete mat foundation.

• For zone 3 : there are 8 (eight) points of thermocouple in the Tower area • For Zone 4 : there are 9 (nine) points of thermocouple • And for Zone 7 : there will be 8 (eight) points of thermocouple

• Total : 25 thermocouples; • Each thermocouple divided into 4 layers –reading control wire (Top, Middle I, Middle II, Bottom).

Installing Thermocouple

• Install the thermocouple in the suitable area.

• Grouting the cable pipe by using grouting cement.

• Read the thermocouple after the concrete poured and covered by plastic & plywood.

THERMOCOUPLE MONITORING ZONE 3

Thermocouple at Zone 3 • Zone 3 : there are 8 (eight) thermocouples • After concreting finish per subzone and layering by floor hardener,

then the concrete covered by concrete plastic and plywood as the curing method.

• Temperature monitoring is started in the 1st hour after the concrete covered by plastic and plywood.

• Reading the thermocouple in every an hour for two days to control the critical hour of concrete temperature; then temperature reading will be continued in every 3 hours until day-7.

• Maximum temperature at Zone 3 :

- Top : 83°C - Middle I : 96°C - Middle II : 96°C - Bottom : 87°C - Air : 35°C

THERMOCOUPLE MONITORING ZONE 4

Thermocouple at Zone 4 • Zone 4 : there are 9 (nine) thermocouples • After concreting finish per subzone and layering by floor hardener,

then the concrete covered by concrete plastic and plywood as the curing method.

• Temperature monitoring is started in the 1st hour after the concrete covered by plastic and plywood.

• Reading the thermocouple in every an hour for two days to control the critical hour of concrete temperature; then temperature reading will be continued in every 2 hours until day-7.



THERMOCOUPLE MONITORING ZONE 3 & 4





• Maximum concrete temperature at Zone 3 is higher than the temperature at Zone 4 (as shown in the monitoring table).

• At Zone 3, Temperature monitoring read every an hour for two days and continued every 3 hour until day-7.

• While at Zone 4, Temperature monitoring read every an hour for two days and continued every 2 hour until day-7 (to have more control for the temperature).

Concrete covered by plastic and plywood

Thermocouple

MONITORING Concrete TEMPERATURE

FINISH POURING (LAYERING BY FLOOR HARDENER)

COVERED THE CONCRETE BY PLASTIC AND PLYWOOD

After an hour

READ CONCRETE TEMPERATURE

(THERMOCOUPLE)

OPEN THE PLYWOOD WHETHER THE CONCRETE

TEMPERATURE IS GOING HIGHER (>15°C)

PUT THE PLYWOOD DOWN WHEN THE

CONCRETE TEMPERATURE IS GOING

LOWER AND STABLE

START

FINISH

TEMPERATURE MONITORING UNTIL DAY-7

• The curing system by covering the concrete with plastic and plywood.

• Opening the plywood when the temperature is going higher to control the concrete temperature.

Concrete curing at ZONE 3 & 4

• Basically, the curing system for zone 3 and zone 4 has no difference.

• Up and down plywood to control the temperature is executed in turn.

• For getting a better control at Zone 4, we read the concrete temperaure more often for every 2 hour in the day-3 to day-7.

•Based on the monitoring result for zone 3, we did a better control management for concrete curing by up-down the plywood regularly at Zone 4 and read the temperature more often. •We would also apply this curing control management for the next zone.

Documents

Curing System for Mat-foundation