Technical data as excerpt from the new German cement standard DIN 1164 and concrete examination according to DIN 1048

The materials used by the Atelier-Ambros are orange marked

Cement types

Of in the European preliminary standard the contained cements became the keeping of the high German quality standard only those cement types transferred to the German standard, those in Germany for almost all tasks of building as suitably to be regarded, with those thus under the local climatic conditions and here usual civil engineering already sufficient, positive experiences to be won could.

CEM I: Portland cement CEM II: Portland composite cement CEM III: Blast-furnace cement

The new strength classes

As a function of the 28 days pressure strength becomes differentiated between the strength classes 32.5, 42.5 and 52.5 (table 2). These three classes divided after their initial strengtheningnesses again into usually confirming (without identification letters) and fast confirming cements.

(Identification letter R = rapidly). Again into the standard a cement with high standard strength (52,5) was taken up, but more normally Initial strength. Thus six strength classes result.

Table 2: Strength classes and identification colour codes from cement to DIN 1164

Strength class	Pressure strength N/mm²				Identification colour code	Color of the print
	Initial strength		Standard strength 28 days
	2 days	7 days
32,5	-	16	32,5	52,5	light brown	black
32,5 R	10	-	32,5	52,5	light brown	red
42,5	10	-	42,5	62,5	green	black
42,5 R	20	-	42,5	62,5	green	red
52,5	20	-	52,5	-	red	black
52,5 R	30	-	52,5	-	red	white

 

Cements with special characteristics

The requirements of cements with high Sulfate resistance (HS) or low heat of hydration (size) is with following Change taken over. Beside haven land cements with low
C3A content apply now all blast furnace cements CEM III/B as HS-cements. There the lower limit of the granulated blast-furnace slag content for the group B with 66% lies, means this a small reduction of the necessities Granulated blast-furnace slag content in relation to the value of 70% demanded so far.
The cements seized so far in the building rule list also low effective alkali content (WELL) to the cement standard were transferred. Those Requirements were dhingehend extended dhingehend that now all cements according to DIN 1164, their alkali content at the most 0.60 weight - Amounts to % Na2O equivalent as Well cements apply. Besides further blast furnace cements CEM III/A with one apply Granulated blast-furnace slag content of at least 50 weight - % and an alkali content of at the most 1.10 weight - % and/or blast furnace cements CEM III/B with an alkali content of at the most 2.00 weight - % as well cements.

The new cement designations

Table 3: Confrontation of new and old cement designations

	neu	alt
CEM I	Portland cement (CEMI)	Portland cement (PZ)
CEM II	Portland blast-furnace cement (CEM II/A-S, CEM II/B-S) Portland puzzolana cement (CEM II/A-P, CEM II/B-P) Portland flue ash cement (CEM II/A-V) Portland oil shale cement (CEM II/A-T, CEM II/B-T) Portland lime stone cement (CEM II/A-L) Portland flue ash steel works cement (CEM II/B-SV)	Iron portland cement (EPZ) Trass cement (TrZ) Flue ash cement (FAZ) Portland oil shale cement (PÖZ) Portland lime stone cement (PKZ) flue ash steel works cement (FAHZ)
CEM III	blast-furnace cement (CEM III/A, CEM III/B)	blast-furnace cement (HOZ)

White haven land cements are standard cements after CEM I 42.5 R and CEM I 52,5. Opposite grey cement it is subject to the additional examination of the white degree. White cement contains the same firmness-forming clinker phases as grey Portland cement. These are Tricalzium and Dicalziumsilikate as well as Tricalziumaluminat.

The substantial quality criterion of these cements, which white color develops, exclusive and controls due to natural influences. Plays beside the use of bright limestone and kaolin as clay/tone component those Cooling of the glowing cement clinker an important role.

By a special procedure we prevent the formation of ferric oxides, those cause the colouring with the grey cement considerably.