CN1235131A - Method for modifying concrete - Google Patents

Method for modifying concrete Download PDF

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Publication number
CN1235131A
CN1235131A CN 99116208 CN99116208A CN1235131A CN 1235131 A CN1235131 A CN 1235131A CN 99116208 CN99116208 CN 99116208 CN 99116208 A CN99116208 A CN 99116208A CN 1235131 A CN1235131 A CN 1235131A
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cement
lignosulfonic acid
quaternary ammonium
sand
compression strength
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CN 99116208
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CN1083807C (en
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谢亦富
刘伟区
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Guangzhou Chemical Co Ltd of CAS
Guangzhou Institute of Chemistry of CAS
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Guangzhou Institute of Chemistry of CAS
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Priority to CN99116208A priority Critical patent/CN1083807C/en
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Publication of CN1083807C publication Critical patent/CN1083807C/en
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  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

A process for modifying cement concrete features that quaternary ammonium lignosulfonate (0.15-0.25%) is used as additive for increasing the dispersity of cement and decreasing the consumption of water greatly.

Description

The method of cement concrete modifying
The present invention relates to a kind of method of cement concrete modifying.
Concrete admixture is one of indispensable component of modern concrete, is a kind of important method and the technology of concrete modifying.Mix a small amount of admixture and just can change the serviceability of fresh concrete, the physical and mechanical property and the weather resistance of raising maturing, thereby help realizing mechanized construction, satisfy the needs of different engineerings, can save cement simultaneously, reduce cost cement concrete.Common concrete aggregate admixture mainly contains following a few class both at home and abroad: 1) sulfonated lignin and modifier thereof; 2) naphthalenesulfonate formaldehyde condensation compound; 3) Soxylat A 25-7 and derivative thereof; 4) polycyclic aromatic hydrocarbon sulfonate formaldehyde condensation products; 5) melamine sulfonate and formaldehyde polycondensate; 6) polycarboxylic acid series additive comprises: a. polycarboxylate system, and b. contains sulfonic poly carboxylic acid multipolymer, and c. maleic anhydride copolymer, d. contain carboxylic acid group, sulfonic polycarboxylic acid series.Along with developing rapidly of world economy, the modern architecture industry is more and more higher to the requirement of cement concrete material, the concrete technology development is in a new change period again, and development novel high-performance cement concrete admixture is the popular research topic of countries in the world always.
Sulfonated lignin, particularly calcium lignin sulphonate are present most popular ordinary water-reducing agents, and this shows at Chen Jiankui in " principle of concrete admixture and application " and the U.S. Pat 4,373,956 (1983) and all disclosed.
The purpose of this invention is to provide a kind of method that makes cement concrete modifying with the lignosulfonic acid quaternary ammonium salt as admixture.
The present invention adopts the lignosulfonic acid quaternary ammonium salt, is that raw material prepares by ion exchange method with the calcium lignin sulphonate, is respectively: lignosulfonic acid CH 3N +(CH 2CH 2OH) 3Salt, lignosulfonic acid CH 3N +(CH 2CH 3) 3Salt, lignosulfonic acid (CH 3) 3N +CH 2CH 2N +(CH 3) 3Salt, lignosulfonic acid C 6H 5CH 2N +(CH 2CH 3) 3Salt, lignosulfonic acid CH 3(CH 2) 15N +(CH 3) 3Salt, adds in the water inlet mud than the consumption that is 0.15-0.25% with by mass of cement as concrete admixture with this.
Used lignosulfonic acid quaternary ammonium salt is 5000～15000 for good with molecular weight ranges.
Lignosulfonic acid quaternary ammonium salt admixture result of use provided by the invention sees Table 1 and table 2, and flowing degree of net paste of cement is measured according to method shown in the GB8077-87; Cement paste and sand-cement slurry ultimate compression strength are measured according to method shown in the GB177-77, and sand meets the specification of quality of stipulating among the GB178-77 in the sand-cement slurry, and the weight ratio of cement and standard sand is 1: 2.5; The method shown in the GB1346-89 of pressing time of coagulation is measured.
From table 1 and table 2 data as can be seen, five kinds of different chemical structures lignosulfonic acid quaternary ammonium salts provided by the invention are done
Five kinds of lignosulfonic acid quaternary ammonium salts of table 1 are to the influence of cement performance
Sample number Volume (%) Flowing degree of net paste of cement/mm Cement paste 28d ultimate compression strength Sand-cement slurry 28d ultimate compression strength
Water cement ratio Degree of mobilization Water cement ratio Ultimate compression strength/MPa Water cement ratio Ultimate compression strength/MPa
?A ????0.15 ?0.35 ?143 ?0.35 ????67.3 ?0.37 ????46.1
????0.25 ?0.33 ?161 ?0.33 ????68.4 ?0.35 ????46.3
?B ????0.15 ?0.35 ?138 ?0.35 ????65.0 ?0.37 ????44.3
????0.25 ?0.33 ?155 ?0.33 ????66.8 ?0.35 ????46.0
?C ????0.15 ?0.35 ?140 ?0.35 ????66.0 ?0.37 ????45.5
????0.25 ?0.33 ?159 ?0.33 ????68.8 ?0.35 ????46.3
?D ????0.15 ?0.35 ?150 ?0.35 ????62.2 ?0.37 ????42.7
????0.25 ?0.33 ?160 ?0.33 ????65.9 ?0.35 ????45.9
?E ????0.15 ?0.35 ?143 ?0.35 ????60.8 ?0.37 ????42.3
????0.25 ?0.33 ?155 ?0.33 ????71.1 ?0.35 ????47.0
?F ????0.15 ?0.35 ?143 ?0.35 ????66.3 ?0.37 ????44.6
????0.25 ?0.33 ?166 ?0.33 ????64.3 ?0.35 ????43.5
Blank ????0 ?0.35 ?114 ?0.40 ????54.4 ?0.44 ????40.3
Five kinds of lignosulfonic acid quaternary ammonium salts of table 2 are to the cement paste influence of time of coagulation
Sample number Volume is 0.15%, water cement ratio is 0.35 Volume is 0.25%, water cement ratio is 0.33
Presetting period/min Final setting time/min Presetting period/min Final setting time/min
????A ????295 ????376 ????384 ????467
????B ????261 ????321 ????367 ????457
????C ????267 ????352 ????345 ????420
????D ????289 ????366 ????387 ????467
????E ????284 ????366 ????391 ????476
????F ????317 ????403 ????426 ????511
Blank Water cement ratio is 0.40: presetting period=208min, final setting time=295min
Annotate 1: volume is the per-cent of additive by mass of cement in the table
Annotate 2:A-lignosulfonic acid CH 3N +(CH 2CH 3) 3Salt
B-lignosulfonic acid CH 3N +(CH 2CH 2OH) 3Salt
C-lignosulfonic acid C 6H 5CH 2N +(CH 2CH 3) 3Salt
D-lignosulfonic acid (CH 3) 3N +CH 2CH 2N +(CH 3) 3Salt
E-lignosulfonic acid CH 3(CH 2) 15N +(CH 3) 3Salt.
F-lignosulfonic acid Ca 2+For cement additire can obviously improve the degree of mobilization of newly mixing cement paste; From the cement paste compression strength value, when volume is 0.25%, water cement ratio is under 0.33 the condition, the cement paste 28d ultimate compression strength that the cement paste 28d compressive strength rate of mixing above-mentioned five kinds of lignosulfonic acid quaternary ammonium salts is mixed calcium lignin sulphonate on average improves 3.4Mpa; From the sand-cement slurry compression strength value, when volume is 0.25%, water cement ratio is under 0.37 the condition, the sand-cement slurry 28d ultimate compression strength that the sand-cement slurry 28d compressive strength rate of mixing above-mentioned five kinds of lignosulfonic acid quaternary ammonium salts is mixed calcium lignin sulphonate on average improves 2.8Mpa; From data time of coagulation, time of coagulation on average shorten 53.6min than the cement paste of mixing calcium lignin sulphonate cement paste time of coagulation of mixing above-mentioned five kinds of lignosulfonic acid quaternary ammonium salts, thereby demonstrate more excellent application performance.
Embodiment 1
Mix the lignosulfonic acid CH of by mass of cement 0.15% 3N +(CH 2CH 3) 3Salt, water cement ratio is that 0.35 flowing degree of net paste of cement is 143mm, presetting period to be that 295min, final setting time are 376min, with do not mix clean slurry of admixture reference cement or the identical degree of mobilization of sand-cement slurry under, cement paste ultimate compression strength reaches 67.6MPa, sand-cement slurry ultimate compression strength reaches 46.1MPa.
Embodiment 2
Mix the lignosulfonic acid CH of by mass of cement 0.25% 3N +(CH 2CH 2OH) 3Salt, water cement ratio is that 0.33 flowing degree of net paste of cement is 155mm, presetting period to be that 367min, final setting time are 457min, with do not mix clean slurry of admixture reference cement or the identical degree of mobilization of sand-cement slurry under, cement paste ultimate compression strength reaches 66.8MPa, sand-cement slurry ultimate compression strength reaches 46.0MPa.
Embodiment 3
Mix the lignosulfonic acid C of by mass of cement 0.15% 6H 5CH 2N +(CH 2CH 3) 3Water cement ratio is that 0.35 flowing degree of net paste of cement is 140mm, presetting period to be that 267min, final setting time are 352min, with do not mix clean slurry of admixture reference cement or the identical degree of mobilization of sand-cement slurry under, cement paste ultimate compression strength reaches 66.0MPa, sand-cement slurry ultimate compression strength reaches 45.5MPa.
Embodiment 4
Mix the lignosulfonic acid (CH of by mass of cement 0.25% 3) 3N +CH 2CH 2N +(CH 3) 3Salt, water cement ratio is that 0.33 flowing degree of net paste of cement is 160mm, presetting period to be that 387min, final setting time are 467min, with do not mix clean slurry of admixture reference cement or the identical degree of mobilization of sand-cement slurry under, cement paste ultimate compression strength reaches 65.9MPa, sand-cement slurry ultimate compression strength reaches 45.9MPa.
Embodiment 5
Mix the lignosulfonic acid CH of by mass of cement 0.25% 3(CH 2) 15N +(CH 3) 3Salt, water cement ratio is that 0.33 flowing degree of net paste of cement is 155mm, presetting period to be that 391min, final setting time are 476min, with do not mix clean slurry of admixture reference cement or the identical degree of mobilization of sand-cement slurry under, cement paste ultimate compression strength reaches 71.1MPa, sand-cement slurry ultimate compression strength reaches 47.0MPa.

Claims (3)

1, a kind of method of cement concrete modifying is characterized in that:, add among the mud of intaking than the consumption that is 0.15-0.25% with by mass of cement as cement concrete admixture with the lignosulfonic acid quaternary ammonium salt.
2, according to claims 1 described method, it is characterized in that: positively charged ion is respectively in the chemical structure of used lignosulfonic acid quaternary ammonium salt: CH 3N +(CH 2CH 3) 3, CH 3N +(CH 2CH 2OH) 3, C 6H 5CH 2N +(CH 2CH 3) 3, (CH 3) 3N +CH 2CH 2N +(CH 3) 3, CH 3(CH 2) 15N +(CH 3) 3
3, according to claims 1 or 2 described methods, it is characterized in that: the molecular weight ranges of lignosulfonic acid quaternary ammonium salt is 5000～15000.
CN99116208A 1999-05-28 1999-05-28 Method for modifying concrete Expired - Fee Related CN1083807C (en)

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CN1083807C CN1083807C (en) 2002-05-01

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1093098C (en) * 2000-03-22 2002-10-23 中国科学院广州化学研究所 Cement concrete modifying method with condensate of melamine sulfonate and formaldehyde
CN101189107B (en) * 2005-05-13 2010-09-29 新日本石油株式会社 System for production of solid modified sulfur products
CN102584071A (en) * 2011-01-06 2012-07-18 海宁润辉塑胶有限公司 Cement additive produced by replacing active material with inert material

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4373956A (en) * 1981-09-14 1983-02-15 Martin Marietta Corporation Additive for hydraulic cement mixes
CN1030574A (en) * 1987-06-25 1989-01-25 清华大学 High-efficient water reducer made of alkyl aryl sulfonate and aldehyde naphthalene sulfonate condensate
CN1041712C (en) * 1994-12-14 1999-01-20 华南理工大学 Method for preparing high impervious and anticorrosive concrete with ternary agent

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1093098C (en) * 2000-03-22 2002-10-23 中国科学院广州化学研究所 Cement concrete modifying method with condensate of melamine sulfonate and formaldehyde
CN101189107B (en) * 2005-05-13 2010-09-29 新日本石油株式会社 System for production of solid modified sulfur products
CN102584071A (en) * 2011-01-06 2012-07-18 海宁润辉塑胶有限公司 Cement additive produced by replacing active material with inert material

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