APPROVED SOURCES

RETARDING, AND WATER REDUCING & RETARDING ADMIXTURES FOR BRIDGE DECK AND DRILLED SHAFT CONCRETE WHEN EXTENDED WORKING TIME IS REQUIRED

GUIDELINES FOR DOSAGE RATES WITH ANTICIPATED WORKING TIME LIMITS

1. Dosage is in fluid ounces per 100 lbs. (mL/kg) of cement, fly ash, and ggbfs.

2. Check percent of air as retarding admixtures tend to increase air contents

Working time limits for various cements with NO RETARDER
Mix Temp at point of discharge		Dosage	Type I/II, no fly ash	Type I/II with fly ash	Type IS, IP with fly ash
°F	°C	fl. oz./cwt	hours	hours	hours
55	13	0	3.8	4.8	5.8
65	18	0	3.1	3.8	4.6
75	24	0	2.5	3.0	3.5
85	29	0	2.2	2.5	2.7
95	35	0	1.9	1.9	1.9

Working time limits for various cements with Catexol 1000 R
Mix Temp at point  of discharge		Dosage	Type I/II, no fly ash	Type I/II with fly ash	Type IS, IP with fly ash
°F	°C	fl. oz./cwt	hours	hours	hours
55	13	2.0	4.5	5.5	6.5
		3.0	5.5	6.5	7.5
		4.0	7.0	8.0	9.0
		5.0
65	18	3.0	4.8	5.5	6.3
		4.0	5.6	6.3	7.1
		5.0	6.8	7.5	8.3
		6.0
75	24	3.0	5.2	5.7	6.2
		4.0	5.7	6.2	6.7
		5.0	6.7	7.2	7.7
		6.0
		7.0
85	29	3.0	4.8	5.1	5.3
		4.0	5.4	5.7	5.9
		5.0	6.2	6.5	6.7
		6.0
		7.0
95	35	3.0	4.5	4.5	4.5
		4.0	5.1	5.1	5.1
		5.0	5.7	5.7	5.7
		6.0	6.5	6.5	6.5
		7.0
		8.0

Working time limits for various cements with Daratard 17
Mix Temp at point  of discharge		Dosage	Type I/II, no fly ash	Type I/II with fly ash	Type IS, IP with fly ash
°F	°C	fl. oz./cwt	hours	hours	hours
55	13	2.0
		3.0
		4.0
		5.0
65	18	3.0
		4.0
		5.0
		6.0
75	24	3.0	4.3	4.7	5.3
		4.0	6.6	7.1	7.6
		5.0	7.6	8.1	8.6
		6.0
		7.0
85	29	3.0	4.3	4.6	4.8
		4.0	5.2	5.5	5.7
		5.0	6.5	6.8	7.0
		6.0
		7.0
95	35	3.0	3.9	3.9	3.9
		4.0	4.4	4.4	4.4
		5.0	5.7	5.7	5.7
		6.0
		7.0
		8.0

Working time limits for various cements with Delvo Stabilizer (Hydration stabilizer)
Mix Temp at point of discharge		Dosage	Type I/II, no fly ash	Type I/II with fly ash	Type IS, IP with fly ash
°F	°C	fl. oz./cwt	hours	hours	hours
65	18	2.0	4.4	5.4	6.4
		3.0	4.9	5.9	6.9
		4.0	5.4	6.4	7.4
		5.0	5.9	6.9	7.9
		6.0	6.4	7.4	8.4
		7.0	7.4	8.4	9.4
		8.0	8.4	9.4	10.4
75	24	2.0	3.3	4.3	5.3
		3.0	3.8	4.8	5.8
		4.0	4.3	5.3	6.3
		5.0	4.8	5.8	6.8
		6.0	5.3	6.3	7.3
		7.0	5.8	6.8	7.8
		8.0	6.8	7.8	8.8
85	29	3.0	3.0	4.0	5.0
		4.0	3.5	4.5	5.5
		5.0	4.0	5.0	6.0
		6.0	4.5	5.5	6.5
		7.0	5.0	6.0	7.0
		8.0	5.5	6.5	7.5
		9.0	6.5	7.5	8.5
95	35	4.0	2.7	2.7	2.7
		5.0	3.2	3.2	3.2
		6.0	3.7	3.7	3.7
		7.0	4.2	4.2	4.2
		8.0	4.7	4.7	4.7
		9.0	5.2	5.2	5.2
		10.0	6.2	6.2	6.2

Working time limits for various cements with Eucon Retarder 100
Mix Temp at point  of discharge		Dosage	Type I/II, no fly ash	Type I/II with fly ash	Type IS, IP with fly ash
°F	°C	fl. oz./cwt	hours	hours	hours
55	13	2.0
		3.0	9.6	10.6	11.6
		4.0	10.4	11.4	12.4
		5.0	12.3	13.3	15.3
65	18	3.0	8.2	8.9	9.7
		4.0	10.0	10.7	11.5
		5.0	11.7	12.4	13.2
		6.0	12.9	13.6	14.4
75	24	3.0	7.5	8.0	8.5
		4.0	9.9	10.4	10.9
		5.0	11.9	12.4	12.9
		6.0	12.5	13.0	13.5
		7.0
85	29	3.0	6.8	7.1	7.3
		4.0	9.6	9.9	10.1
		5.0	11.9	12.2	12.4
		6.0	11.9	12.2	12.4
		7.0
95	35	3.0	6.8	6.8	6.8
		4.0	9.9	9.9	9.9
		5.0	11.8	11.8	11.8
		6.0	11.8	11.8	11.8
		7.0
		8.0

Working time limits for various cements with Plastiment
Mix Temp at point  of discharge		Dosage	Type I/II, no fly ash	Type I/II with fly ash	Type IS, IP with fly ash
°F	°C	fl. oz./cwt	hours	hours	hours
55	13	2.0
		3.0
		4.0
		5.0
65	18	3.0	5.1	5.8	6.6
		4.0	7.1	7.8	8.7
		5.0	11.4	12.0	13.0
		6.0	20.2	20.8	19.0
75	24	3.0	3.6	4.0	4.2
		4.0	4.7	5.1	5.4
		5.0	6.9	7.4	7.8
		6.0	10.9	11.4	12.1
		7.0	18.9	19.3	20.5
85	29	3.0	3.0	3.3	3.1
		4.0	3.6	3.9	3.8
		5.0	4.9	5.1	5.1
		6.0	6.9	7.1	7.2
		7.0	10.2	10.5	10.3
95	35	3.0	2.2	2.2	2.2
		4.0	2.7	2.7	2.7
		5.0	3.5	3.5	3.5
		6.0	4.9	4.9	4.9
		7.0	7.4	7.4	7.4
		8.0	12.1	12.1	12.1

Working time limits for various cements with Plastiment ES
Mix Temp at Point of discharge		Dosage	Type I/II, no fly ash	Type I/II with fly ash	Type IS, IP with fly ash
^oF	^oC	fl. oz./cwt	hours	hours	hours
65	18	3.0	4.2	5.8	6.3
		4.0	6.5	6.9	7.8
		5.0	10.5	11.0	12.4
		6.0	18.8	18.5	18.9
75	24	3.0	3.3	3.8	4.6
		4.0	4.4	5.0	5.8
		5.0	6.7	7.0	7.7
		6.0	10.3	10.8	11.5
		7.0	17.7	17.5	19.5
85	29	3.0	2.5	3.1	3.7
		4.0	3.3	3.7	4.4
		5.0	4.5	5.0	5.5
		6.0	6.6	6.8	7.4
		7.0	10.2	10.6	10.6
95	35	3.0	1.8	2.2	3.6
		4.0	2.5	2.7	2.9
		5.0	3.3	3.6	4.1
		6.0	4.5	4.7	5.1
		7.0	7.9	7.9	8.8
		8.0	11.8	12.4	12.9

Working time limits for various cements with Polychem R
Mix Temp at point of discharge		Dosage	Type I/II, no fly ash	Type I/II with fly ash	Type IS, IP with fly ash
°F	°C	fl. oz./cwt	hours	hours	hours
65	18	2.0	4.5	5.2	6.0
		3.0	6.0	6.7	7.5
		4.0	7.5	8.2	9.0
		5.0	8.3	9.0	9.8
		6.0	9.8	10.5	11.3
75	24	2.0	4.3	4.8	5.3
		3.0	5.5	6.0	6.5
		4.0	6.8	7.3	7.8
		5.0	7.8	8.3	8.8
		6.0	8.8	9.3	9.8
85	29	2.0	4.0	4.3	4.5
		3.0	5.0	5.3	5.5
		4.0	6.0	6.3	6.5
		5.0	7.3	7.6	7.8
		6.0	8.5	8.8	9.0

Working time limits for various cements with Pozzolith 100 XR
Mix Temp at point  of discharge		Dosage	Type I/II, no fly ash	Type I/II with fly ash	Type IS , IP with fly ash
°F	°C	fl. oz./cwt	hours	hours	hours
55	13	2.0
		3.0
		4.0
		5.0
65	18	3.0	9.0	9.7	10.5
		4.0
		5.0
		6.0
75	24	3.0	6.1	6.6	7.1
		4.0	7.8	8.3	8.8
		5.0	9.2	9.7	10.2
		6.0
		7.0
85	29	3.0	5.2	5.5	5.7
		4.0	6.7	7.0	7.2
		5.0	8.1	8.4	8.6
		6.0
		7.0
95	35	3.0	4.5	4.5	4.5
		4.0	6.0	6.0	6.0
		5.0	7.4	7.4	7.4
		6.0
		7.0
		8.0

Working time limits for various cements with Pozzolith 300 R
Mix Temp at point of discharge		Dosage	Type I/II, no fly ash	Type I/II with fly ash	Type IS, IP with fly ash
°F	°C	fl. oz./cwt	hours	hours	hours
55	13	2.0	4.5	5.5	5.5
		3.0	5.3	6.3	6.3
		4.0	6.8	7.8	8.8
		5.0
65	18	3.0	4.6	5.3	6.1
		4.0	5.5	6.2	7.0
		5.0	6.8	7.5	8.3
		6.0
75	24	3.0	4.7	5.2	5.7
		4.0	6.0	6.5	7.0
		5.0	7.2	7.7	8.2
		6.0
		7.0
85	29	3.0	4.6	4.9	5.1
		4.0	5.3	5.6	5.8
		5.0	6.4	6.7	6.9
		6.0
		7.0
95	35	3.0	4.1	4.1	4.1
		4.0	4.7	4.7	4.7
		5.0	5.6	5.6	5.6
		6.0	6.6	6.6	6.6
		7.0
		8.0

Working time limits for various cements with Recover
Mix Temp at point  of discharge		Dosage Rate	Type I/II, no fly ash	Type I/II with fly ash	Type IS, IP with fly ash
°F	°C	fl. oz/cwt	hours	hours	hours
75	24	0	3.2	4.2	5.2
		3.0	4.8	5.8	6.8
		4.0	5.5	6.5	7.5
		5.0	6.3	7.3	8.3
		6.0	7.6	8.6	9.6
85	29	0	2.9	3.9	4.9
		3.0	4.4	5.4	6.4
		4.0	4.7	5.7	6.7
		5.0	5.3	6.3	7.3
		6.0	6.0	7.0	8.0
95	35	0	2.2	3.2	4.2
		3.0	2.8	3.8	4.8
		4.0	3.0	4.0	5.0
		5.0	3.7	4.7	5.7
		6.0	4.5	5.5	6.5

Working time limits for various cements with SikaTard 440 (Hydration Controlling Admixture)
Mix Temp at point of discharge		Dosage	Type I/II, no fly ash	Type I/II with fly ash	Type IS, IP with fly ash
°F	°C	fl. oz./cwt	hours	hours	hours
65	18	2.0	4.3	5.9	7.1
		3.0	5.5	7.1	8.3
		4.0	7.2	8.8	10.0
		5.0	8.3	9.9	11.1
		6.0	10.5	12.1	13.3
		7.0	12.3	13.9	15.1
		8.0	13.0	14.6	15.8
75	24	2.0	3.5	4.9	5.8
		3.0	4.4	5.8	6.7
		4.0	5.4	6.2	7.1
		5.0	6.6	8.0	8.9
		6.0	8.0	9.4	10.3
		7.0	9.6	10.0	10.9
		8.0	10.4	11.8	12.7
85	29	3.0	3.1	4.3	4.9
		4.0	3.6	4.8	5.4
		5.0	4.2	5.4	6.0
		6.0	4.9	6.1	6.7
		7.0	5.7	6.9	7.5
		8.0	6.6	7.8	8.3
		9.0	7.6	8.8	9.4
95	35	4.0	2.7	3.7	4.0
		5.0	3.3	4.3	4.6
		6.0	4.0	5.0	5.3
		7.0	4.8	5.8	6.1
		8.0	5.7	6.7	7.0
		9.0	6.7	7.7	8.0
		10.0	7.8	8.8	9.1