Portland blast-furnace slag cement

ASTM C595 Type IS (20)

Name: ASTM C595 Type IS (20)
Brand: Caribbean Imports

As low as $4.80 / 42.5 kg bag

1.5 MT FIBC · Quote only

ASTM slag cement with a published 44.1 MPa 28-day result. Type IS (20) — target 20% slag. 42.5 kg bags or 1.5 MT jumbos. 2,500 MT minimum.

How you take it

Bags or jumbos

Same cement. Two packs.

42.5 kg

45 bags per sling

As low as $4.80 / 42.5 kg bag

The bagged pack for resale and site delivery.

1.5 MT

Single-trip jumbo bag

Quote only

The jumbo pack when you want fewer lifts.

How it ships

Name the port. We price bags, jumbos, and the shipment.

Cement-mortar strength

Representative product results for ASTM C595 Type IS (20)
Test age	Source result	Approx. PSI	Reference / limit	Method
3 days	21.2 MPa	≈3,070 psi	Minimum 13	ASTM C109
7 days	28.9 MPa	≈4,190 psi	Minimum 20	ASTM C109
28 days	44.1 MPa	≈6,400 psi	Minimum 25	ASTM C109

Complete reported profile

setting, and physical properties for ASTM C595 Type IS (20)
Property	Reported result	Reference / limit	Method
Initial setting time	137 min	Minimum 45	ASTM C191
Final setting time	200 min	Maximum 420	ASTM C191
Autoclave expansion	0.05 %	Maximum 0.80	ASTM C151
Air content of mortar	5.9 %	Maximum 12	ASTM C185
Specific surface · Blaine	421 m²/kg	—	ASTM C204

Chemical analysis for ASTM C595 Type IS (20)
Property	Reported result	Reference / limit	Method
Loss on ignition	2.65 %	Maximum 3.0	ASTM C114
Insoluble residue	0.59 %	Maximum 1.0	ASTM C114
Silicon dioxide · SiO₂	22.87 %	—	ASTM C114
Aluminium oxide · Al₂O₃	5.76 %	—	ASTM C114
Iron oxide · Fe₂O₃	3.13 %	—	ASTM C114
Calcium oxide · CaO	60.67 %	—	ASTM C114
Magnesium oxide · MgO	2.12 %	—	ASTM C114
Sulfur trioxide · SO₃	1.70 %	Maximum 3.0	ASTM C114
Potassium oxide · K₂O	0.64 %	—	ASTM C114
Sodium oxide · Na₂O	0.13 %	—	ASTM C114

Representative product results support fast comparison; the shipment MTC or COA is the lot-specific quality record.

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