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RESEARCH PROJECT CHRYSO POLSKA

NO. 08-11-01

Summary of the study :

The assessment of the admixtures impact on the consistency and on the

compressive strengths of concrete cured in winter conditions.

Aim and scope of research.

The aim of research: the assessment of the impact of concrete admixtures (water-reducing,

high range water-reducing, accelerating hardening, accelerating bonding/water-reducing) on

the consistency of concrete, as a function of time and on the early compressive strength of

concrete samples cured in winter conditions.

The scope of research: comparison of the properties of test concrete and concrete modified

with different admixtures.

Strength development as a function of time, @ 0C :

X axis : time (h)

Y axis : Strengths (N / mm2)

ZP 131 : Control : 0,55 % CHRYSOPlast 580

ZP 144 : 1,1 % CHRYSOFluid CE 40 + 1,1 % CHRYSOXel ADZP 145 : 1,1 % CHRYSOFluid CB + 1,1 % CHRYSOXel AD

ZP 146 : 1,1 % CHRYSOPlast Omega 132 + 1,1 % CHRYSOXel AD

ZP 147 : 1,1 % CHRYSOFluid CE 30 + 1,1 % CHRYSOXel AD

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Red line : Critical Strength (5 MPa) = theoretical minimal level of strength for the concrete

to withstand one freeze thaw cycle.

Grading of the admixtures' influence:

Admixture

CHRYSODosage range

Possible influence on fresh and hardened properties

compared to the reference concrete with plasticizer

Fluidizing

propoerty

Slump

retention

Setting @ 24

h

Strengths

(48-72h)

Fluid CE 40 0,71,0

Very strong :

Can replace

BV and

~15-20 kg

water

-/+No

retardation--/-

Fluid CB 0,71,0

Strong ; canreplace

BV and ~10-

15 kg

water

--No

retardation++

Plast Omega

1320,61,0

Very strong;

zastpuje BV i

15-20 kg wody

+++

Retards

(concrete still

plastic after

24 H)

-/+

Xel AD 0,81,2No significant

change+

No

retardation+/++

Xel 384 0,81,2No significant

change-/+

No

retardation+/++

Xel 650 0,81,2No significant

change-/+

No

retardation+/++

Xel GTX 1,01,5

strong; can

replace BV

and 10 kg

water

---

No

retardation,

even

accelerates

+++

Spolos X 1,01,5

Strong; can

replace

BV and 10-15kg

water

-

No

retardation;

even

accelerates

++

Fluid CE 40

+ Xel

0,71,0 +

0,81,2

Very strong;

Can replace

BV and 20

kg water

-No

retardation-/+

Fluid CB +

Xel

0,71,0 +

0,81,2

strong; can

replace BV

and 15 kg

water

--/-

No

retardation,

even

accelerates

+++

Plast Omega

132 + Xel

0,71,0 +

0,81,2

Strong; canreplace BV

and 20 kg

water

+++No

retardation+

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BV = Old type plasticiser

+/- no significant influence

- or + slight deterioration or improvement

-- or ++ visible deterioration or improvement

--- or +++ extremely visible deterioration or improvement

Diagram Slump loss / Time to get 5 MPa Critical Strength :

X-axis : Time to reach the 5 MPa critical strength level (h).

Y-axis : Slump loss (mm).