SU908765A1 - Complex additive to cement-based concrete of mortar mixes - Google Patents

Description

(54) COMPLEX ADDITIVE TO CONCRETE OR MILK BASED MIXTURES

I

The invention relates to compositions of complex additives to concrete or mortar mixes based on cement and can be used in the production technology of building materials - cement compositions with improved properties.

A complex additive to cement-based concrete mix is known, including a hardening inhibitor: an alkaline or alkaline earth borate and three hardening accelerators; alkaline or alkaline earth sulfate, alkali or alkaline earth nitrate, alkali or alkaline earth thiosulfate.

The additive is introduced into the concrete mix with mixing water.

Closest to the present invention is a complex additive to cement-based concrete mix 2j, which includes, wt%:

Potassium chloride 10-: 40

Sodium nitrate 10-40 CEMENT

Sulfite-alcohol bard 2-10 Sodium sulfate 10-78 The disadvantages of the known additives are the relatively quick setting of the mixture and the low strength of the resulting products.

The purpose of the invention is to slow down the setting time and increase the strength of concrete and mortar when the content in cement is 8-14% SzA.

The goal is achieved by the fact that the complex additive to cement-based concrete or mortar mixtures, including sodium chloride, sodium sulfate and plasticizer, additionally contains sodium thiosulfate and an amine-containing compound from the group: aniline, paraphenythidine, ionylamine, diethanolamine, ortho-anidein, as a plasticizer, a compound from the group: sodium technical lignosulfonates. ammonium technical lignosulfoates technical calcium lignosulphonates sodium alkyl sulfates with the number of carbon atoms in the following ratio, wt.%: Sodium chloride 9-25 Sodium sulfate 25-45 Plasticizer 10-55 Sodium thiosulfate 10-25 Luminous compound 0.1-2.0 Essence The invention is as follows. Sodium thiosulfate as a result of thiosulfate-ororg in the cedu-fmzu stagilizes the formed V gp.; Esss hydration of cement hexagonal calcium hydroaluminate of the composition (CaO-A120 / 13-19-H O and it is redox, even when heated, with calcium and aluminate calcium aluminate of the composition) its transition to the cubic hydroaluminate of ZSaO L12S bN20, which proceeds with a significant decrease in the GROWN. The lithium-containing substance in amounts; ST2 up to 0.05% by weight of cement reduces the induction period of the C-jS ethetization guide due to the formation of pop-up icoMimeKCOB and slower start of setting. However, a further increase in the content of the amine-containing substance leads to an acceleration of hydration, as a result of which the onset of seizure can be reduced. As the amine containing substance, aliphatic and aromatic amines, amino alcohols and their derivatives can be used. As a plasticizing component, technical lignosulfonates of sodium, ammonium, calcium and their modifications, alkyl sulfates, alkyl aryl sulfonates, alkyl benzene sulfonates, hydroxy acids can be used. The additive is, under normal conditions, a highly mobile, non-stratifying fluid, convenient for both cementing and grinding concrete in cement. The complex additive is introduced in an amount of 0.30-1% by weight of cement. Table 1 presents the compositions of the proposed complex additive; Table 2 shows the results of physicomechanical tests of cement with known and proposed additives; in table 3 the results of physical and mechanical tests of concrete with known and proposed additives. Table 1

Sodium Chloride Sodium Sulfate Sodium Thiosulfate

Technical sodium lignosulfonates

Ammonium Technical Lignosulfonates

Calcium Technical Lignosulfonate

Sodium alkyl sulfates

with carbon number

in chain 7-9

Aniline

17.5 22.5

9.9 25.0

35.5 31.5

 15.5 10.0 0.0

55.0

31.0

35.0

1.5

Components

Para-fenithidine Nonylamine Diethanolamine Ortho-anisidine

Cement (CgS 58; CjA 9.0%).

 Heat and moisture treatment: 2 + 3 + 6 + 2h at 80 ° C.

The amount of the additive is 3.3% by weight of cement.

Continuation Composition, wt.% I-LLI 3

0.1

0.5

1.0

T a b l and c a

i

Strength, concrete samples lOxlOxlO r.rt

386

250 38 A. 237

The composition of the concrete: 84: 3,62, cement consumption 350 kg / cm, mobility 4-5 cm, heat and moisture treatment: 2 + 3 + 6 + 2 h. V result of applying the IaoMoi complex dogzha otnga otgp significant increase in the strength indicators of cement n Beto at the norm; Glorny tenders and heat treatment. At the same time, the cement is char.chterichus with normal terms of seizure. Claims of the invention A complex additive to concrete or rastorium mixes based on cement, including sodium chloride, sodium sulfate and a plasticizer, is different in that with the aim of slowing down the setting time and increasing the strength of concrete and mortar with a content of 8-14% in cement C-) L, it contains in addition T1 sodium carbonate and amino-containing compound from the group: aniline

373 396 para-phenydidine, nonylamine, cyzous rlamin, ortho-anisidine, and as a plasticizer a compound from the corpse: technical sodium lithnosulfoates, technical lignosulphonates, ammonium, technical lignosul () calcium yunate, sodium alkyl sulphates with carbon atoms C- , -C Q in the following ratio of components, weightL: Sodium chloride 9-25 Sodium sulfate 25-45 Plasticizer 10-55 Sodium thiosulfate 10-75 Amino compound 0.1-2.0 Sources of information taken into account during the examination 1. US Patent No. 3663286, cl. S 04 V 13/24, 1979. 2. USSR author's certificate No. 633840, cl; From 04 To 13/22, 1977.

Claims (1)

Claim A complex additive to cement-based concrete or mortar mixes, including sodium chloride, 35 sodium sulfate and a plasticizer, is distinguished by the fact that, in order to slow down the setting time and increase the strength of concrete and mortar when kept in cement 40 8-14 % С ^ Л, it additionally contains sodium thiosulfate and an amine-containing compound from the group: aniline, para-phenytidine, nonylamine, diethanolamine, ortho-aisisidine, and as a plasticizer a compound from the corpse: technical sodium lignosulfonates, technical ammonium lignosulfonates oia, technical calcium lignosulfonates, sodium alkyl sulfates with the number of carbon atoms C -, - C d in the following ratio of components, wt.%: Sodium Chloride 9-25 Sodium Sulfate 25-45 Plasticizer 10-55 Sodium Thiosulfate I0-Z5 Amine-containing compound 0.1-2.0