SE453077B - Method for improving properties of cement and concrete - Google Patents
Method for improving properties of cement and concreteInfo
- Publication number
- SE453077B SE453077B SE8603779A SE8603779A SE453077B SE 453077 B SE453077 B SE 453077B SE 8603779 A SE8603779 A SE 8603779A SE 8603779 A SE8603779 A SE 8603779A SE 453077 B SE453077 B SE 453077B
- Authority
- SE
- Sweden
- Prior art keywords
- cement
- silicic acid
- concrete
- waste
- prescribed
- Prior art date
Links
- 239000004568 cement Substances 0.000 title claims abstract description 26
- 239000004567 concrete Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000002699 waste material Substances 0.000 claims abstract description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 8
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminium flouride Chemical compound F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 claims abstract description 6
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 36
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 35
- 239000000654 additive Substances 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 6
- 239000011083 cement mortar Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 claims description 4
- -1 hexafluorosilicic acid Chemical compound 0.000 claims description 2
- 125000005624 silicic acid group Chemical group 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 12
- 239000010703 silicon Substances 0.000 abstract description 6
- 229910052710 silicon Inorganic materials 0.000 abstract description 6
- 230000006872 improvement Effects 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract 5
- 239000004615 ingredient Substances 0.000 abstract 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 5
- 239000011737 fluorine Substances 0.000 description 5
- 229910052731 fluorine Inorganic materials 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000746 purification Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000013074 reference sample Substances 0.000 description 2
- 239000011856 silicon-based particle Substances 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 201000004624 Dermatitis Diseases 0.000 description 1
- 101100383686 Metarhizium anisopliae chi11 gene Proteins 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 208000010668 atopic eczema Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
453 077 DE-OS 22 19 503 och SE-A-8502243-2 ( avser förfaranden för rening av kiselsyran före, genom eller efter behandling med en alkali och tillverkning av alkalisilikater, i synnerhet natriumsilikat. ' Vid ofullständig' rening av kiselsyran från aluminium och speciellt fluor erhålls instabilt vattenglas, i synnerhet vid spädning med vatten. 453 077 DE-OS 22 19 503 and SE-A-8502243-2 (refer to processes for purification of the silicic acid before, through or after treatment with an alkali and manufacture of alkali silicates, in particular sodium silicate. ' In case of incomplete purification of the silicic acid from aluminum and especially fluorine is obtained unstable water glass, especially when diluted with water.
SE-A-8205825-6 beskriver ett förfarande för högkvalitativ rening av angiven kíselsyra som ger en mycket ren kiselsyra, som kan användas inom ett flertal tekniska områden.SE-A-8205825-6 describes a process for high quality purification of the indicated silicic acid which gives a very pure silicic acid, which can be used in several technical areas.
Dock kvarstår ett önskemål att finna en direkt användning av den vid produktion av aluminiumfluorid erhållna restprodukten, dvs med aluminium och fluor förore- nad kiselsyra.However, a desire remains to find a direct use of it in production obtained from aluminum fluoride, ie contaminated with aluminum and fluorine nad silicic acid.
Det är känt att extremt finkornigt kiselstoft, en restprodukt från tillverkning av metalliskt kisel eller legeringsämnet kiseljärn, har fått en användning som s k puzzolan vid tillverkning av betong (Sellevold, E. et al: Condensed silica fume in concrete. Institutt for Byggningsmateriallaere, NTH, Trondheim 1982 respek- tive Bache, D: Densifíed cement/ultrafine particle-based materials. Proc. 2znd Int. Conf. on Superplasticizers in concrete. Ottawa June 10-12, 1981). Detta kiselstoft består av kulformade partiklar med en kornstorlek mellan 0,01 - l/um (ca 70% <0,1/um), dvs ca 100 gånger mindre än cementpartiklar, och med en specifik yta av 20 uno m2/kg.It is known to be extremely fine-grained silicon dust, a residual product from manufacturing of metallic silicon or the alloying element silicon iron, has been used as so-called pozzolan in the manufacture of concrete (Sellevold, E. et al: Condensed silica fume in concrete. Department of Building Materials Science, NTH, Trondheim 1982 tive Bache, D: Densified cement / ultrafine particle-based materials. Proc. 2znd Int. Conf. on Superplasticizers in concrete. Ottawa June 10-12, 1981). This Silica dust consists of spherical particles with a grain size between 0.01 - l / μm (about 70% <0.1 / um), ie about 100 times smaller than cement particles, and with a specific surface area of 20 uno m2 / kg.
En puzzolan reagerar kemiskt med kalkhydrat till kalciumsilikathydrater, liknan- de dem som bildas vid cementhydratisering, och som ger en tätare cementgel, dvs den hâllfasthetsbildande komponenten i betong.A pozzolan chemically reacts with lime hydrate to form calcium silicate hydrates, similar to those formed during cement hydration, which give a denser cement gel, ie the strength-forming component in concrete.
Kiselstoftets puzzolaneffekt tillskrivs dels finkornigheten, dels partiklarnas kul- form och dels den extremt stora specifika ytan (Sellevold, E.: Silika i betong.The puzzolan effect of silicon dust is attributed partly to the fine-grainedness and partly to the carbonation of the particles. shape and partly the extremely large specific surface (Sellevold, E .: Silica in concrete.
Virkesmáteasom pozzolan och filler. BALLASTDAGAR, Luleå 13~15 september 19s2l Avfallskiselsyra frân aluminiumfluoridproduktion har en kornstorlek och specifik 5453 071 yta liknande dem för portlandcement. Kornstorleken är 100 gånger större än för kiselstoft, den ligger mellan 1 och 100 /um, och specifika ytan enligt BLAINE är 600 mz/kg jämfört med kiselstoftets 20 000 mZ/kg. Partiklarna är inte kul- formade. Den relativa kornstorleken mellan cement- och kiselpartiklarna kan illustreras vid en beräkning där kisel och cement blandas i viktförhållande 1:10, vilket rekommenderas vid användning av kísel i betong. För kiselstoft erhålls med hänsyn till kompaktdensiteten ca 50 000 kiselpartiklar per cementpartikel, för kiselsyra från aluminiumfluoridprocessen 20 - 50 kíselsyrapartiklar per cementpartikel.Timber like pozzolan and filler. BALLAST DAYS, Luleå 13 ~ 15 September 19s2l Waste silicic acid from aluminum fluoride production has a grain size and specific 5453 071 surface similar to those for portland cement. The grain size is 100 times larger than for silicon dust, it is between 1 and 100 / um, and specific surface according to BLAINE is 600 mz / kg compared to the silicon dust's 20,000 mZ / kg. The particles are not formed. The relative grain size between the cement and silicon particles can illustrated in a calculation where silicon and cement are mixed in a weight ratio of 1:10, which is recommended when using silicon in concrete. For silicon dust is obtained taking into account the compact density of about 50,000 silicon particles per cement particle, for silicic acid from aluminum fl uorid process 20 - 50 silicic acid particles per cement particle.
Beskrivning av föreliggande uppfinning Föreliggande uppfinning avser användning av kiselsyra från aluminiumfluoríd- processen som puzzolan í betong, i synnerhet vid varmt klimat. Om 5 - 10% men ända upp till 1596 av den avsedda cementmängden i betong eller cementbruk ersätts eller kompletteras med motsvarande mängd kiselsyra, erhalls förutom lägre kostnader för cement följande effekt: 1. Cementbrukets eller betongens hällfasthet ökar och ligger efter 28 dygn - 35% högre än utan kiselsyra. 2. Betongens täthet ökar. 3. Tillstyvnandet fördröjs. Fördröjningen bedöms vid normal temperatur (20°C) inte medföra nâgra större praktiska problem, men är i varmt kli- ma: (ao - ss°chi11 fördel. ' 4. Vattenseparation blir vid låg dosering oförändrad och minskar vid den högre doseringen.Description of the present invention The present invention relates to the use of silicic acid from aluminum fluoride. the process as the pozzolan in concrete, especially in hot climates. About 5 - 10% men up to 1596 of the intended amount of cement in concrete or cement mortar replaced or supplemented with the corresponding amount of silicic acid, obtained in addition lower costs for cement the following effect: 1. The cement strength of the cement mill or concrete increases and remains after 28 days - 35% higher than without silicic acid. 2. The density of the concrete increases. 3. The stiffening is delayed. The delay is assessed at normal temperature (20 ° C) does not cause any major practical problems, but is in hot ma: (ao - ss ° chi11 advantage. ' 4. Water separation remains unchanged at low dosage and decreases with it higher dosage.
. Lufthalten i betongen ändras inte. 6. variationer i kiselsyrans halt av föroreningar av aluminium och fluor har ingen väsentlig inverkan pâ kiselsyrans effekt.. The air content in the concrete does not change. 6. variations in the silicic acid content of aluminum and fluorine impurities no significant effect on the effect of silicic acid.
Kiselsyran har således trots helt avvikande kemisk och fysikalisk form samma egenskaper att förbättra betong som kiselstoft, dock med en betydligt längre fördröjning av betongmassans tillstyvnande.The silicic acid thus has the same despite completely different chemical and physical form properties to improve concrete as silicon dust, however, with a much longer delay of the stiffening of the concrete mass.
En färsk betongblandning utan tillsats av nämnda avfallskiselsyra förblir vid en temperatur av 20°C hanterbar under 3 - 4 timmar (motsvarande ett penetra- 453 077 tíonsmotständ pà upp till 8 kp/cmz), vid en temperatur av 35°C endast under ca 2 timmar. Vid tillsats av denna kiselsyra eller om 5 - 1096 av cementmängden ersätts med motsvarande mängd kiselsyra erhålls en förlängning av tiden för hanterbarheten med 50 - 10096. Detta är ofta av mycket stort värde vid betong- gjutning i områden med varmt klimat.A fresh concrete mixture without the addition of said waste silicic acid remains at a temperature of 20 ° C manageable for 3 - 4 hours (corresponding to a penetration 453 077 resistance of up to 8 kp / cmz), at a temperature of 35 ° C only below about 2 hours. When adding this silicic acid or about 5 - 1096 of the amount of cement replaced with the corresponding amount of silicic acid, an extension of the time is obtained manageability of 50 - 10096. This is often of great value in concrete casting in areas with hot climates.
Exem 1 Cementbruk motsvarande hàllfasthetsklassen K 30 tillverkades med svensk stan- dardcement (Slite Std) och ballast med max 8 mm kornstorlek som referens.Eczema 1 Cement mills corresponding to the strength class K 30 were manufactured with Swedish standard dard cement (Slite Std) and ballast with a maximum of 8 mm grain size as a reference.
Parallellt tillverkades cementbruk med den avvikelsen att 2,5, 5 resp 1096 av cementmängden ersattes med kíselsyraavfall innehållande 2,396 aluminium och 3,996 fluor (beteckning SN 2,5, SN 5, SN 10). Provningarna har utförts enligt svensk standard vid 20°C och med följande resultat.In parallel, cement mills were manufactured with the deviation of 2.5, 5 and 1096 of the amount of cement was replaced by silicic acid waste containing 2,396 aluminum and 3,996 fluorine (designation SN 2.5, SN 5, SN 10). The tests have been performed according to Swedish standard at 20 ° C and with the following results.
Lufthalten (SS 137111) lag i alla prover mellan 4 och 696 av betongvolymen.The air content (SS 137111) in all samples between 4 and 696 of the concrete volume.
Vattenseparation (SS 137112) redovisas i figur 1. Vid tillsats av 596 minskar vat- tenseparationen obetydligt, vid tillsats av 10% kiselsyra kan vattenseparationen minskas till hälften.Water separation (SS 137112) is reported in Figure 1. With the addition of 596, water the tin separation is insignificant, with the addition of 10% silicic acid the water separation can reduced by half.
Tillstyvnande (SS 137114) kallas skedet då betongen efter gjutníngen gradvis övergår från en arbetbar till en icke arbetbar massa. figur 2 visar att kiselsyra- tillsatsen ger en retardation, dvs fördröjning av tillstyvnandet på mellan 50 och 10096 av referensprovets tidsförlopp.Stiffening (SS 137114) is the stage when the concrete is gradually poured after casting transitions from a workable to a non-workable mass. Figure 2 shows that silicic acid the additive gives a deceleration, i.e. delay of the stiffening of between 50 and 10096 of the time course of the reference sample.
Tryckhallfastheten enligt SS 137210 var de första 2 - 3 dygnen nagot sämre för alla prover innehållande kiselsyra än för referensprovet, ökade dock sedan kraf- tigt och var efter 28 dygn 1596 högre vid en tillsats av 596 kiselsyra än referens- provet. En tillsats av 1096 kiselsyra gav en betong med 2896 högre tryckhállfast- het. Det redovisade provet med beteckningen S0 5 innehöll 596 kíselsyra med en extremt hög aluminiumhalt (2,796) och fluorhalt (5,396). Som framgår av figu- ren avviker resultaten mycket litet från normala kiselsyravärden.The compressive strength according to SS 137210 was slightly worse for the first 2 - 3 days all samples containing silicic acid than for the reference sample, however, the and was after 28 days 1596 higher with an addition of 596 silicic acid than the reference tried. An addition of 1096 silicic acid gave a concrete with 2896 higher compressive strength hot. The reported sample with the designation S0 5 contained 596 silicic acid with an extremely high aluminum content (2,796) and fluorine content (5,396). As can be seen from FIG. pure results deviate very little from normal silicic acid values.
ExemEl 2 Cementbruk med och utan kiselsyraavfall blandades och undersöktes på samma 453 077 sätt som vid exempel 1, dock vid en temperatur av 35°C i stället för 20°C. Dessa försök visar att tilstyvnandet generellt minskar med ca g1 timma för alla prover och fördröjs vid kiselsyratillsats med ca 5096 i relation till cementbruk utan till- sats (figur 4). Tryckhâllfastheten i betong med kíselsyratillsats 'förbättras redan efter 2 dygn och är efter 28 dygn 35% högre än betong utan kiselsyratillsats (figur 5).Example 2 Cement mortar with and without silicic acid waste was mixed and investigated on the same 453 077 method as in Example 1, but at a temperature of 35 ° C instead of 20 ° C. These experiments show that the stiffness generally decreases by about g1 hour for all samples and is delayed by the addition of silicic acid by about 5096 in relation to cement mortar without rate (Figure 4). The compressive strength of concrete with silicic acid additive is already improved after 2 days and after 28 days is 35% higher than concrete without silicic acid additive (Figure 5).
Exemggl 3 Betong med sammansättning motsvarande den som föreskrivs i Sverige vid typ- godkännandeprovning av tillsatsmedel och innehållande sten med kornstorlek upp till 32 mm tillverkades, varvid i hälften av proverna 5% av cementmängden ersattes med kiselsyraavfall. Samma resultat betr vattenseparation, tillstyvnande och tryckhallfasthet erhölls som med cementbruk, dock ökade förbättringen av tryckhâllfastheten för proverna innehållande kiselsyra vid kontroll efter 28 dygn med 35% jämfört med proverna utan kíselsyratillsats (figur 6).Exemggl 3 Concrete with a composition corresponding to that prescribed in Sweden for approval testing of additives and containing stone with grain size up to 32 mm were produced, with 5% of the cement amount in half of the samples replaced with silicic acid waste. The same result concerns water separation, stiffening and compressive strength was obtained as with cement mortar, however, the improvement increased of the compressive strength of the samples containing silicic acid when checked after 28 day by 35% compared to the samples without silicic acid additive (Figure 6).
Claims (5)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8603779A SE453077B (en) | 1986-09-09 | 1986-09-09 | Method for improving properties of cement and concrete |
| IN577/DEL/87A IN170970B (en) | 1986-09-09 | 1987-07-08 | |
| ZA875041A ZA875041B (en) | 1986-09-09 | 1987-07-10 | A method for improving the properties of cement mortar and concrete |
| BR8704654A BR8704654A (en) | 1986-09-09 | 1987-09-08 | PROCESS TO INCREASE CEMENT AND CONCRETE MORTAR QUALITIES |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8603779A SE453077B (en) | 1986-09-09 | 1986-09-09 | Method for improving properties of cement and concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE453077B true SE453077B (en) | 1988-01-11 |
Family
ID=20365533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8603779A SE453077B (en) | 1986-09-09 | 1986-09-09 | Method for improving properties of cement and concrete |
Country Status (4)
| Country | Link |
|---|---|
| BR (1) | BR8704654A (en) |
| IN (1) | IN170970B (en) |
| SE (1) | SE453077B (en) |
| ZA (1) | ZA875041B (en) |
-
1986
- 1986-09-09 SE SE8603779A patent/SE453077B/en not_active IP Right Cessation
-
1987
- 1987-07-08 IN IN577/DEL/87A patent/IN170970B/en unknown
- 1987-07-10 ZA ZA875041A patent/ZA875041B/en unknown
- 1987-09-08 BR BR8704654A patent/BR8704654A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| IN170970B (en) | 1992-06-20 |
| BR8704654A (en) | 1988-04-26 |
| ZA875041B (en) | 1988-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| SE460288B (en) | ADDITIVE MIXTURE FOR CONCRETE AND USE, PROCEDURE FOR ITS PREPARATION AND APPLICATION OF ITS | |
| CN110372232B (en) | Non-shrinkage cementing material prepared from phosphogypsum, preparation method thereof and concrete | |
| JP7047634B2 (en) | A method for producing an admixture for mortar / concrete, a cement composition containing the same, a mortar composition and a concrete composition, and a hardened mortar and a hardened concrete. | |
| Hou et al. | In situ Ca (OH) 2 consumption of TEOS on the surface of hardened cement-based materials and its improving effects on the Ca-leaching and sulfate-attack resistivity | |
| WO2020183429A1 (en) | A mortar composition and a process for its preparation | |
| CN116283117A (en) | Concrete pavers with high strength and low weathering | |
| CN114656184B (en) | Sulfate erosion resistant concrete additive, preparation method thereof and concrete | |
| Ogork et al. | Properties of cement paste and concrete containing calcium carbide waste as additive | |
| Ajayi et al. | Suppression of alkali-silica reactions in concrete by partially replacing cement with cassava peel ash | |
| SE453078B (en) | PROCEDURE FOR IMPROVING CEMENT USE AND CONCRETE PROPERTIES | |
| EP4352027A1 (en) | Adjuvant for increasing the short-term mechanical strength of a hydraulic composition with a reduced clinker content | |
| SE453077B (en) | Method for improving properties of cement and concrete | |
| EP0848690A1 (en) | Concrete compositions and processes for controlling alkali-silica reaction in same | |
| EP3122698B1 (en) | Belite sulfoaluminate binder | |
| Borosnyói | Development of compressive strength of HPC with the use of supplementary cementing material (SCM) combination | |
| US3087825A (en) | Corrosion-resistant cementitious mineral building materials and method of productionof the same | |
| EP2159202A1 (en) | Adhesive, compound comprising a slag and an additive and a method for creating a building material | |
| Srivastava et al. | Silica fume–an admixture for high quality concrete | |
| JP2020183339A (en) | Admixture for mortar / concrete, cement composition containing it, mortar composition and concrete composition, and method for producing hardened mortar and hardened concrete | |
| CN109437614A (en) | The alkali-activated carbonatite cementitious material and preparation method thereof of the low alkali soluble output of room temperature maintenance | |
| CN116354670A (en) | A kind of sea sand concrete and preparation method thereof | |
| CN117024076B (en) | A kind of crack-resistant and corrosion-resistant concrete and preparation method thereof | |
| CN109354436B (en) | Special glue material bag for pre-prepared mortar suitable for washing sea sand and preparation method thereof | |
| CN119774956B (en) | Corrosion-resistant large-volume marine concrete and preparation method thereof | |
| CN116553898B (en) | Gypsum-based self-leveling material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NAL | Patent in force |
Ref document number: 8603779-3 Format of ref document f/p: F |
|
| NUG | Patent has lapsed |