Table 4 R2 for different models of compressive strength—temperature correlation.

From: Influence of very high temperatures on properties of medium grained lightweight aggregate mortars containing perlite and various cement types

Model

Linear

Polynomial (2nd degree)

Exponential

Logarithmic

OPC EP0

0.9144

0.9833

0.7016

0.5454

OPC EP25

0.9516

0.9677

0.7736

0.6470

OPC EP50

0.9540

0.9542

0.8053

0.7177

OPC EP75

0.9392

0.9471

0.7655

0.6515

OPC EP100

0.9563

0.9974

0.7911

0.6290

CSAC EP0

0.8126

0.9631

0.9789

0.9964

CSAC EP25

0.8262

0.9758

0.9927

0.9991

CSAC EP50

0.8157

0.9709

0.9882

0.9986

CSAC EP75

0.8157

0.9692

0.9799

0.9981

CSAC EP100

0.7842

0.9482

0.9469

0.9913

CAC EP0

0.9101

0.9236

0.8324

0.6025

CAC EP25

0.9060

0.9074

0.8392

0.6446

CAC EP50

0.8952

0.8956

0.8271

0.6444

CAC EP75

0.8570

0.8571

0.8020

0.6201

CAC EP100

0.8987

0.9039

0.8790

0.7107

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