碱激发胶凝材料的碱骨料反应研究.ppt

碱激发胶凝材料的碱骨料反应研究.pptTopic: ALKALI-SILICATE REACTION  RESISTANCE OF AGGREGATES AND FILLERS IN ALKALI-ACTIVATED CEMENTS AND CONCRETES
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TEST PROGRAMME
Target:
Initial setting time  1hr
1d CS  10MPa
28d CS  40 MPa
EN modified mortar tests with const. flow 200 ± 20 mm
Consider:
equivalent solid alkali content vs. (slag + AS) (%)
real w/c ratio (incl. water used in alkali solution)
cost of formulation
1
ALKALI-AKTIVATE SLAG-BASALT CEMENT FORMULATION
Set I :
-----------------------------------------------------------------------------------
Slag  Mariupol
AS  Basalt
Alkalis  low, medium dosage: (Na-silicate Ms = 2,87 +
NaOH)0,5
OPC  5 or 10%
 ----------------------------------------------------------------------------------
Slag  Mariupol
AS  Basalt
Alkalis  low or medium dosage: (Na-silicate Ms=1
Na2C03)0,5
OPC  5 or 10%
  ----------------------------------------------------------------------------------
All 8 mixes should be tested for their ASR resistance.
2
ALKALI-ACTIVATED SLAG-BASALT CEMENT FORMULATION
Set II :
------------------------------------------------------------------------------------
Slag  Mariupol
AS  F-FA, with 25 % Al2O3
Alkalis  low, medium dosage: (Na-silicate Ms = 2,87 +
NaOH)0,5
OPC  5 or 10%
 -----------------------------------------------------------------------------------
Slag  Mariupol
AS  F-FA, with 25 % Al2O3
Alkalis  low or medium dosage: (Na-silicate Ms=1
Na2C03)0,5
OPC  5 or 10%
  -----------------------------------------------------------------------------------
All 8 mixes should be tested for their ASR resistance.
3
RAW MATERIALS
(Set I and Set II)
Slag (ground) (Mariupol)  Ssp = 4200 cm2/g (Blaine), Mb = 1,19
OPC (Krivoy Rog)  Ssp = 3050 cm2/g (Blaine)
Basalt Rock (ground)  Ssp = 6603 cm2/g (Blaine)
Fly ash (not ground,
“as received”)  Ssp = 3355 cm2/g (Blaine)
Standard sand  according to EN 196
Cement/ sand ratio  1 : 3
ponents:
 WG (Ms= 2,87) + NaOH (1:1), r