CN1260165C

CN1260165C - Modifier for lignin sulfonate as concrete water reducing agent

Info

Publication number: CN1260165C
Application number: CN 200410065665
Authority: CN
Inventors: 金树青; 许衡宇; 夏威; 张伟明; 金骥; 沈熙佐; 程刚
Original assignee: 金树青; 沈熙佐
Priority date: 2004-11-08
Filing date: 2004-11-08
Publication date: 2006-06-21
Anticipated expiration: 2024-11-08
Also published as: CN1609041A

Abstract

The present invention relates to a modifying agent for a lignosulphonate water reducing agent for concrete, which belongs to the technical field of a concrete additive. The present invention aims to provide a modifying agent for a lignosulphonate water reducing agent for concrete, wherein the modifying agent has the advantage of lower price and can increase the water reducing rate of a conventional type water reducing agent and partially replace the dosage of the high-efficiency water reducing agent in a concrete pumping agent. The modifying agent is prepared from the following raw materials in weight percentage: 50 to 95 of triethanolamine, 4 to 50 of lauryl sulfate sodium salt and 0.05 to 2 of defoaming agent. Experiment testing indicates that the water reducing rate of a lignosulphonate water reducing agent produced in China and a wood sodium water reducing agent produced in Russia can be increased to 12 to 15% after being mixed with the modifying agent with the mixed amount of 0.2 to 1.5%, and 15% of high-efficiency water reducing agent can be equivalently replaced by compounding the modifying agent and naphthalene and anthracene high-efficiency water reducing agents into a pumping agent; furthermore, the modifying agent has the advantages of low cost price, less mixed amount, broad application ranges and good economic and social benefits.

Description

The properties-correcting agent of lignin sulfonate as concrete water reducing agent

Technical field:

The present invention relates to the properties-correcting agent of a kind of concrete admixture, particularly a kind of lignin sulfonate as concrete water reducing agent.

Background technology:

The water-reducing rate of cement water reducing agent is an important techniques index.Requirement according to GB GB8076-1997: coventional type cement water reducing agent water-reducing rate first grade is not less than 8%, and salable product are not less than 5%.And heavy duty detergent cement water reducing agent first grade is not less than 12%, and salable product are not less than 10%.From the eighties, the waste water that China promptly successfully produces papermaking is developed into the sulfonated lignin water reducer and is applied in architectural.Do paper making raw material with timber, its paper pulp wastewater can be made into calcium lignin sulphonate, is called for short wooden calcium.Do paper making raw material with non-timber, as reed, bamboo, bagasse, straw etc., its paper pulp wastewater can produce sodium lignosulfonate and magnesium lignosulfonate, is called for short wooden sodium and wooden magnesium.The wooden sodium that home-made wood calcium, wooden sodium, wooden magnesium and Russian Karma slurry factory produce, the water-reducing rate of these four kinds of water reducers is all between 8-9%.Therefore, belong to the coventional type cement water reducing agent.As naphthalene system and anthracene series high-efficiency water-reducing agent that concrete pump-feed agent adopted,, therefore, strengthened building cost undoubtedly at present because its price is more expensive.

Summary of the invention:

Technical problem to be solved by this invention is: the properties-correcting agent that a kind of lignin sulfonate as concrete water reducing agent is provided, it not only can improve the water-reducing rate of coventional type water reducer, the coventional type water reducer is used as high efficiency water reducing agent, and can also equivalent replace the high efficiency water reducing agent consumption in the concrete pump-feed agent.Its technical scheme is: a kind of properties-correcting agent of lignin sulfonate as concrete water reducing agent is characterized in that: it is made by following raw materials by weight percent:

Trolamine 50-95 sodium lauryl sulfate 4-50 defoamer 0.05-2.

Above-mentioned three kinds of raw materials are mixed, promptly get the properties-correcting agent of this water reducer.

Its technique effect is:

Show through experiment test: in the pulvis of above-mentioned sulfonated lignin (referring to the wooden sodium that home-made wood calcium, wooden sodium, wooden magnesium and Russia produce) water reducer, after mixing the properties-correcting agent of the present invention of 0.2-1.5% of its amount, its water-reducing rate can be brought up to 12-15% by the 8-9% that does not originally add properties-correcting agent, reaches the standard-required (ask for an interview table 1-sulfonated lignin coventional type water reducer and add the forward and backward water-reducing rate synopsis of properties-correcting agent of the present invention) of GB heavy duty detergent water reducer.

Table 1

Numbering	Cement	The water reducer title	Water reducer volume % aqua	1: 3 sand-cement slurry water consumption g	Sand-cement slurry degree of mobilization mm	Water-reducing rate %	Intensity Mpa
							Intensity Mpa				R3		R28
							Resistance to compression	Anti-folding	Resistance to compression	Anti-folding	R3		R28
							Resistance to compression	Anti-folding	Resistance to compression	Anti-folding	1 2 3 4 5 6 7 8 9	The general silicon of the general silicon of the general silicon of the general silicon of the general silicon of the general silicon of the general silicon of the general silicon of general silicon	The domestic wooden magnesium of the domestic wooden calcium import wood sodium of domestic wooden sodium adds the domestic wooden sodium of modifier and adds the domestic wooden calcium of modifier and add modifier import wood sodium and add the domestic wooden magnesium of modifier	1 1 1 1 1 1 1 1	225 207 205 205 207 196 192 192 198	160 161 157 158 158 157 161 160 160	8 9 9 8 13 15 15 12	30.2 33.4 33.9 34.2 32.1 32.0 32.4 33.2 33.1	5.33 5.80 5.93 6.4 5.82 5.9 6.26 5.95 5.57	47.5 49 49.5 50 49 50.1 50.3 50.8 50.8	6.9 7.1 7.15 7.19 6.9 7.1 7.0 7.1 7.1

The aqua of the water reducer 1% in the above-mentioned table 1 is meant that the water of 0.25%+0.75% of pulvis water reducer is formulated.

Cement in the above-mentioned table 1 is P.O42.5 level ordinary Portland cement.

Simultaneously, also show after testing: after in above-mentioned sulfonated lignin ordinary water-reducing agent, mixing its properties-correcting agent of the present invention, itself and naphthalene system and anthracene series high-efficiency water-reducing agent are mixed with pumping agent, can equivalent replace high efficiency water reducing agent 15% (ask for an interview table 2-by the pumping agent of naphthalene system and the preparation of anthracene series high-efficiency water-reducing agent with replace naphthalene and be and the contrast table of the pumping agent that anthracene series high-efficiency water-reducing agent consumption is prepared by adding sulfonated lignin water reducer equivalent behind the properties-correcting agent)

Table 2

Numbering	The pumping agent preparation					Pumping agent volume %	The concrete mix weight ratio				Slump mm	Equivalent replaces high efficiency water reducing agent %	Ultimate compression strength Mpa
	The pumping agent preparation						The concrete mix weight ratio						Ultimate compression strength Mpa		Naphthalene series high-efficiency water-reducing agent %	Anthracene series high-efficiency water-reducing agent %	Sulfonated lignin % after the modification	Air entrapment agent	Water consumption %	P.O 42.5 ordinary portland cements	Medium sand	Medium stone	Water cement ratio	R7	R28
	1 2 3 4 5 6	20 11 11 11 11	15 9 9 9 9	Wood calcium 15 wooden sodium 15 wooden magnesium 15 imports wood sodium 15	Trace trace trace trace trace		65 65 65 65 65	1 1 1 1 1	1 1 1 1 1 1	2.41 2.41 2.41 2.41 2.41 2.41			3.32 3.32 3.32 3.32 3.32 3.32	0.55 0.55 0.55 0.55 0.55 0.55	Naphthalene series high-efficiency water-reducing agent %	Anthracene series high-efficiency water-reducing agent %	Sulfonated lignin % after the modification	Air entrapment agent	Water consumption %	P.O 42.5 ordinary portland cements	Medium sand	Medium stone	Water cement ratio	R7	R28	60 130-140 150-160 150-160 120-130 150-160	0 0 15 15 15 15	30.6 29.9 30.3 30.2 28.90 31.0	42.3 41.8 41.9 41.6 40.8 42.0

In addition, the sulfonated lignin water reducer after the modification of the present invention is with respect to efficient water reducers such as naphthalene system and anthracene systems, and its cost value is much lower.Therefore, its applied range, economic and social benefit is good:

1, for papermaking producer, when paper waste is handled, can in the technological process of production that is made into the sulfonated lignin water reducer, add properties-correcting agent of the present invention, the coventional type water reducer is promoted be high efficiency water reducing agent.Both can turn waste into wealth, improve environment, benefit and the people; Can also obviously improve the economic benefit of manufacturer.

2, for concrete admixture producer, in the sulfonated lignin water reducer of buying, mix properties-correcting agent of the present invention after, the coventional type water reducer can be used as high efficiency water reducing agent, can produce favorable economic benefit.

3, for concrete admixture producer, sulfonated lignin coventional type water reducer that can price is lower is modified as heavy duty detergent sulfonated lignin water reducer, and can higher naphthalene system and the anthracene of equivalent replacement price be the heavy duty detergent water reducer.Like this, not only reduce the cost of admixture producer concrete batching pumping agent, improved economic benefit; And can also make the concrete pump-feed agent of this preparation, its performances such as rod degree, cohesiveness, bleeding and pumpability have clear improvement.

Embodiment:

1, gets trolamine 50kg, sodium lauryl sulfate 50kg, defoamer 2kg.Mix, promptly get the properties-correcting agent of this water reducer.

2, trolamine 70kg, sodium lauryl sulfate 30kg, defoamer 1kg.Mix, promptly get the properties-correcting agent of this water reducer.

3, trolamine 95kg, sodium lauryl sulfate 4kg, defoamer 0.05kg.Mix, promptly get the properties-correcting agent of this water reducer.

Claims

1, a kind of properties-correcting agent of lignin sulfonate as concrete water reducing agent is characterized in that: it is made by following raw materials by weight percent:

Trolamine 50-95 sodium lauryl sulfate 4-50 defoamer 0.05-2.