PROMACRETE®

PROPERTIES & ADVANTAGES

Dense
Water-resistant refractory concretes
For high temperature applications up to 1650 °C

Refractory concrete for melting and holding furnaces

PROMACRETE® is a well-balanced range of various types of refractory concrete for monolithic refractory linings. These products consist of highly refractory raw materials and aluminous cements.

PROMACRETE® refractory concretes are dense, wear-resistant refractory concretes for high temperature applications up to 1650 °C, e.g. for hearths, burner benches, tunnel kiln cars etc.

Technical data

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	PROMACRETE®
Grade	-PF 132/18	-PF 145/20	-PF 148/23	-PF 158/23	-PF 165/25	-PST 165/24	-PR 145/20
Classification temperature °C	1320	1450	1480	1580	1650	1650	1450
Bulk density kg/m³	1830	2030	2270	2300	2490	2370	2000
Reversible thermal expansion @1000 °C	0.58	0.62	0.64	0.64	0.67	0.71	0.62
Thermal conductivity @1000 °C mean, W/m.K	0.83	1.03	1.40	1.47	1.62	1.57	1.00
Compressive strength (ASTM C 165), N/mm²	17 @1200 °C	30 @1400 °C	90 @1400 °C	80 @1400 °C	90 @1600 °C	20 @1400 °C	18 @1400 °C

	PROMACRETE®
Grade	-PF 132/18	-PF 145/20	-PF 148/23	-PF 158/23	-PF 165/25	-PST 165/24	-PR 145/20
Classification temperature °C	1320	1450	1480	1580	1650	1650	1450
Bulk density kg/m³	1830	2030	2270	2300	2490	2370	2000
Reversible thermal expansion @1000 °C	0.58	0.62	0.64	0.64	0.67	0.71	0.62
Thermal conductivity @1000 °C mean, W/m.K	0.83	1.03	1.40	1.47	1.62	1.57	1.00
Compressive strength (ASTM C 165), N/mm²	17 @1200 °C	30 @1400 °C	90 @1400 °C	80 @1400 °C	90 @1600 °C	20 @1400 °C	18 @1400 °C

Working & processing

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PROMACRETE® compounds are delivered dry in bags. The mixture may demix during transport. We therefore recommend that the complete contents of the bag are put into the mixer. If only parts of the contents are used, mix the dry contents of the bag thoroughly beforehand.
Use only clean tap water for mixing. Acidic water, soft water or water containing sulphate reduces strength and leads to structural faults.
The specific quantity of water required for mixing is a standard value. Mixing should not take less than one minute and not exceed four minutes.
The following on-site test will help you to determine whether the right consistency has been achieved: Make a ball the size of a snowball from the mixed compound, throw it approx. 30 cm in the air and catch it. If it retains its shape, the consistency is right. If it crumbles, the compound is too dry. If it falls through the gaps between your fingers, it is too wet.
PROMACRETE® products should be compressed immediately after mixing, using conventional tools. If setting has already begun, do not recompress.
PROMACRETE® must retain some of the mixing water while it is hardening. It is therefore necessary to protect it from drying out for at least 24 hours.
The setting times change at temperatures below 5 °C. Make sure that the temperature of the prepared concrete is raised to at least 5 °C. Never use frozen material.
For heating up the following rules should be observed: Setting period: 3 days; keep at 100 °C for 24h; keep at 200 °C for 48h; from 200 - 600 °C approx. 20 K/h; from 600 °C until the final temperature 30 K/h.

PROMACRETE® compounds are delivered dry in bags. The mixture may demix during transport. We therefore recommend that the complete contents of the bag are put into the mixer. If only parts of the contents are used, mix the dry contents of the bag thoroughly beforehand.
Use only clean tap water for mixing. Acidic water, soft water or water containing sulphate reduces strength and leads to structural faults.
The specific quantity of water required for mixing is a standard value. Mixing should not take less than one minute and not exceed four minutes.
The following on-site test will help you to determine whether the right consistency has been achieved: Make a ball the size of a snowball from the mixed compound, throw it approx. 30 cm in the air and catch it. If it retains its shape, the consistency is right. If it crumbles, the compound is too dry. If it falls through the gaps between your fingers, it is too wet.
PROMACRETE® products should be compressed immediately after mixing, using conventional tools. If setting has already begun, do not recompress.
PROMACRETE® must retain some of the mixing water while it is hardening. It is therefore necessary to protect it from drying out for at least 24 hours.
The setting times change at temperatures below 5 °C. Make sure that the temperature of the prepared concrete is raised to at least 5 °C. Never use frozen material.
For heating up the following rules should be observed: Setting period: 3 days; keep at 100 °C for 24h; keep at 200 °C for 48h; from 200 - 600 °C approx. 20 K/h; from 600 °C until the final temperature 30 K/h.

PROMACRETE®

PROPERTIES & ADVANTAGES

Refractory concrete for melting and holding furnaces

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