阅读说明：本技术 混凝土阻锈剂及其制备方法 (Concrete corrosion resistant agent and preparation method thereof ) 是由 姚燕 刁桂芝 刘光华 王宏霞 于 2018-05-24 设计创作，主要内容包括：本发明是关于一种混凝土阻锈剂及其制备方法,其中混凝土阻锈剂,以重量组分计,其包括：铝酸盐水泥：70-90份；可溶性无机钙盐：5-15份；矿物掺和料：4-15份；纳米二氧化硅：1-5份。本发明的混凝土阻锈剂对混凝土性能无不利影响,能够和侵蚀离子反应,生成稳定的水化产物,对腐蚀离子有高效的阻滞固化作用。还可以提高混凝土的各龄期强度,降低混凝土的渗透性。(The present invention relates to a kind of concrete corrosion resistant agent and preparation method thereof, wherein concrete corrosion resistant agent, by weight part comprising: aluminate cement: 70-90 parts；Soluble inorganic calcium salt: 5-15 parts；Mineral admixture: 4-15 parts；Nano silica: 1-5 parts.Concrete corrosion resistant agent of the invention has no adverse effect to concrete performance, can generate stable hydrated product with erosion ionic reaction, have efficient retardance solidification to corrosive ions.Each age strength that concrete can also be improved, reduces the permeability of concrete.)

1. a kind of concrete corrosion resistant agent, which is characterized in that by weight part comprising:

Aluminate cement: 70-90 parts；

Soluble inorganic calcium salt: 5-15 parts；

Mineral admixture: 4-15 parts；

Nano silica: 1-5 parts.

2. concrete corrosion resistant agent according to claim 1, which is characterized in that the aluminate cement is CA50 cement.

3. concrete corrosion resistant agent according to claim 1, which is characterized in that 20 DEG C of the soluble inorganic calcium salt Solubility is more than or equal to 10g.

4. concrete corrosion resistant agent according to claim 1, which is characterized in that the mineral admixture is flyash, mine At least one of slag, silicon ash and metakaolin.

5. concrete corrosion resistant agent according to claim 1, which is characterized in that the partial size of the nano silica is 1- 100nm。

6. a kind of preparation method of concrete corrosion resistant agent, characterized in that it comprises:

Aluminate cement, soluble inorganic calcium salt and water are stirred, mixture is obtained；

The mixture is placed into 25-30d, it is dry, with mineral admixture grinding to 300-400m²Nano-silica is added in/kg SiClx mixing, obtains concrete corrosion resistant agent；

Wherein, the concrete corrosion resistant agent, by weight part comprising:

Aluminate cement: 70-90 parts；

Soluble inorganic calcium salt: 5-15 parts；

Mineral admixture: 4-15 parts；

Nano silica: 1-5 parts.

7. the preparation method of concrete corrosion resistant agent according to claim 6, which is characterized in that the mixture, with weight Measure component meter comprising:

Aluminate cement: 70-90 parts；

Soluble inorganic calcium salt: 5-15 parts；

Water: 80-100 parts.

8. the preparation method of concrete corrosion resistant agent according to claim 6, which is characterized in that the aluminate cement is CA50 cement；

20 DEG C of solubility of the soluble inorganic calcium salt is more than or equal to 10g；

The mineral admixture is at least one of flyash, slag, silicon ash and metakaolin；

The partial size of the nano silica is 1-100nm.

9. the preparation method of concrete corrosion resistant agent according to claim 6, which is characterized in that the temperature of the drying is 30-40℃。

Technical field

The present invention relates to a kind of the field of building materials, more particularly to a kind of concrete corrosion resistant agent and preparation method thereof.

Background technique

Many concrete structures are prematurely destroyed, Acceptable life due to its lasting reciprocation with corrosive environment It reduces.Steel bar corrosion is the most important factor for causing architectural engineering to break ring.Countries in the world need to repair due to steel bar corrosion Concrete structure, take a large amount of resource.The main reason for reinforcement corrosion is the corrosion function of chloride ion.Cement-based material Physics and chemical process influence transmission of the chloride ion inside Behavior of Hardened Cement Paste.Corrosion inhibitor, which is used as, prevents concrete erosion and reinforcing bar from becoming rusty The main safeguard measure of erosion.

Aluminate cement has good corrosion resistance and capture chloride ion performance, but aluminate is added directly into coagulation Rheological property and the condensation, Temperature measurement that mixture can be changed in soil, cause difficulty to construction.

Summary of the invention

It is a primary object of the present invention to provide a kind of novel concrete corrosion resistant agent and preparation method thereof, to be solved The technical issues of be make its improve concrete anti-chlorine ion erosion performance, reduce the permeability of concrete, thus more suitable for It is practical.

The object of the invention to solve the technical problems adopts the following technical solutions to realize.It proposes according to the present invention A kind of concrete corrosion resistant agent, by weight part comprising:

Aluminate cement: 70-90 parts；

Soluble inorganic calcium salt: 5-15 parts；

Mineral admixture: 4-15 parts；

Nano silica: 1-5 parts.

The object of the invention to solve the technical problems also can be used following technical measures and further realize.

Preferably, concrete corrosion resistant agent above-mentioned, wherein the aluminate cement is CA50 cement.

Preferably, concrete corrosion resistant agent above-mentioned, wherein 20 DEG C of solubility of the soluble inorganic calcium salt is greater than Equal to 10g.

Preferably, concrete corrosion resistant agent above-mentioned, wherein the mineral admixture is flyash, slag, silicon ash and partially At least one of kaolin.

Preferably, concrete corrosion resistant agent above-mentioned, wherein the partial size of the nano silica is 1-100nm.

Also the following technical solution is employed for the object of the invention to solve the technical problems to realize.It proposes according to the present invention A kind of concrete corrosion resistant agent preparation method comprising:

Aluminate cement, soluble inorganic calcium salt and water are stirred, mixture is obtained；

The mixture is placed into 25-30d, it is dry, with mineral admixture grinding to 300-400m²Nanometer is added in/kg Silica mixing, obtains concrete corrosion resistant agent；

Wherein, the concrete corrosion resistant agent, by weight part comprising:

Aluminate cement: 70-90 parts；

Soluble inorganic calcium salt: 5-15 parts；

Mineral admixture: 4-15 parts；

Nano silica: 1-5 parts.

The object of the invention to solve the technical problems also can be used following technical measures and further realize.

Preferably, the preparation method of concrete corrosion resistant agent above-mentioned, wherein the mixture, by weight part, Include:

Aluminate cement: 70-90 parts；

Soluble inorganic calcium salt: 5-15 parts；

Water: 80-100 parts.

Preferably, the preparation method of concrete corrosion resistant agent above-mentioned, wherein the aluminate cement is CA50 cement；

20 DEG C of solubility of the soluble inorganic calcium salt is more than or equal to 10g；

The mineral admixture is at least one of flyash, slag, silicon ash and metakaolin；

The partial size of the nano silica is 1-100nm.

Preferably, the preparation method of concrete corrosion resistant agent above-mentioned, wherein the temperature of the drying is 30-40 DEG C.

By above-mentioned technical proposal, concrete corrosion resistant agent of the present invention and preparation method thereof is at least had the advantage that

1) aluminate cement and inorganic calcium salt reaction generate X-AFm and X-Aft in concrete corrosion resistant agent of the invention, are having Cl^-In existing environment, X-AFm or X-Aft and Cl^-Reaction generates Cl-AFm or Cl-Aft, plays solidification Cl^-Effect.Mineral The filling effect that admixture and nano silica are not only due to its own makes concrete more closely knit, can also slowly join With hydration reaction, the hydrated product of generation can further fill concrete, permeability reduces, and reduces Cl in concrete^-Intrusion Amount.

2) concrete corrosion resistant agent of the present invention can be under various chlorine ion concentrations, especially in concrete in marine environment Reinforcing bar play the role of corrosion protection, can be effectively reduced the probability and degree of Rust of Rebar in Concrete, resistance rust effect is good, It can be improved the Concrete Structure Design service life.Realize the long life serve of high resistance to corrosion aluminate cement sill.It reduces mixed The permeability of soil is coagulated, it is nontoxic, environmentally friendly.

3) preparation method of concrete corrosion resistant agent of the invention is easy, compared with traditional corrosion inhibitor, to concrete performance without Adverse effect, reduces the permeability of concrete, nontoxic, environmentally friendly.

The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention, And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.

Detailed description of the invention

Fig. 1 is the XRD diagram before and after concrete corrosion resistant agent curing of chloride ion.

Specific embodiment

It is of the invention to reach the technical means and efficacy that predetermined goal of the invention is taken further to illustrate, below in conjunction with Attached drawing and preferred embodiment, to concrete corrosion resistant agent proposed according to the present invention and preparation method thereof its specific embodiment, knot Structure, feature and its effect, detailed description is as follows.In the following description, different " embodiment " or " embodiment " refers to different It surely is the same embodiment.In addition, the special characteristic, structure or feature in one or more embodiments can be by any suitable form group It closes.

A kind of concrete corrosion resistant agent that one embodiment of the present of invention proposes, by weight part comprising:

Aluminate cement: 70-90 parts；

Soluble inorganic calcium salt: 5-15 parts；

Mineral admixture: 4-15 parts；

Nano silica: 1-5 parts.

Preferably, aluminate cement is CA50 cement.

20 DEG C of solubility of soluble inorganic calcium salt is more than or equal to 10g.

Mineral admixture is at least one of flyash, slag, silicon ash and metakaolin.

The partial size of nano silica is 1-100nm.

A kind of preparation method for concrete corrosion resistant agent that another embodiment of the present invention proposes comprising:

By 70-90 parts of aluminate cements, 5-15 parts of soluble inorganic calcium salts and 80-100 parts of water stirrings, mixture is obtained；

The mixture is placed into 25-30d, 30-40 DEG C of drying, with 4-15 parts of mines under 10-30 DEG C of environment temperature Object admixture grinding is to 300-400m²/ kg is added 1-5 parts of nano silica mixing, obtains concrete corrosion resistant agent.

It hinders rust principle are as follows: aluminate cement and inorganic calcium salt reaction generate X-AFm and X-Aft, are there is Cl^-Existing ring In border, X-AFm or X-Aft and Cl^-Reaction generates Cl-AFm or Cl-Aft, plays solidification Cl^-Effect.As shown in Figure 1, curve 1 For the XRD diagram before concrete corrosion resistant agent curing of chloride ion, curve 2 is the XRD diagram after concrete corrosion resistant agent curing of chloride ion, Chloride ion retardance curing component reacts with chloride ion and forms new product afterwards for 24 hours in corrosion inhibitor, illustrate the corrosion inhibitor to chlorine from Son has retardance solidification well.

The filling effect that mineral admixture and nano silica are not only due to its own makes concrete more closely knit, also Can slowly participate in hydration reaction, the hydrated product of generation can further fill concrete, permeability reduces, and reduces coagulation Cl in soil^-Intrusion volume.