Low-cement heat-resistant chamotte concretes

Symbol	Granularity [mm]	Max. working temp.[^oC]	Min. common refractoriness [sP]	Min. Al₂O₃ content [%]	Concrete consumption [t/m3]	Make-up water amount [l/100kg]
BN125	0-3 - 0,5	1250	167	30	2,0	9
BN135	0-3 - 0,5	1350	169	32	2,1	9
BN145	0-3 - 0,5	1450	177	42	2,3	8

Technical parameters after drying and baking

Symbol	after drying in 110 °C			after baking in working temperature
Symbol	Effective porosity [%]	Apparent density [g/cm3]	Shear strength [MPa]	Effective porosity [%]	Apparent density [g/cm3]	Shear strength [MPa]	Contraction (-) [%]
BN125	23	2,0	30	24	2,0	40	-1
BN135	20	2,15	30	22	2,15	45	-1
BN145	20	2,2	35	22	2,3	60	-1,0