TW200800833A - Concrete having high fluidity - Google Patents

Abstract

A concrete having high fluidity is disclosed in which the formulation composition of each cubic meter comprises: 700 kg/m<SP>3</SP> to 850 kg/m<SP>3</SP> coarse aggregate; 850 kg/m<SP>3</SP> to 1050 kg/m<SP>3</SP> fine aggregate; 330 kg/m<SP>3</SP> to 420 kg/m<SP>3</SP> powder; 175 kg/m<SP>3</SP> to 195 kg/m<SP>3</SP> water; and 4.0 kg/m<SP>3</SP> to 5/.0 kg/m<SP>3</SP> super plasticizer, the overall water/binder ratio is 0.42 to 0.55. The super plasticizer is formed of more than one kind of carboxylic acid water reducing agent with high fluidity. By changing the chemical/physical properties of more than one kind of high fluidity carboxyl water reducer agent in carbon main chain length and side carbon chain length, molecular weight, molecular density and/or specific heat coefficient, the water-reducing property and slump maintaining character of the concret can be adjested.

Description

200800833 IX. Description of the invention: [Technical field of the invention] The present invention relates to a high-flow concrete, in particular to a coarse aggregate, a fine aggregate, a powder, a mixing water and a strong plastic agent which utilize a specific ratio, and The strong plasticizer is obtained from a high-flowing Wei acid water reducing agent for high-flow concrete which improves the overall working degree. [Prior Art] Conventional concrete, such as the Republic of China Announcement No. 1239324 "Medium-strength self-filling concrete" invention patent, the proportion of which includes: coarse grain (coarse

Aggregate, 600~1000kg/m3, which is crushed stone or pebble with a maximum particle size of not more than 2.54cm; fine aggregate, 800~l〇〇〇kg/ M3, the fineness modulus (FM) is "2.5~3·2", and the powder's dosage is 450~700kg/m3, which contains at least cement and Pozzolans, wherein the material is contained There are fly ash, slag or silica fume; mixing water, dosage 15〇~I95kg/m3; and superplasticizer, the amount is the amount of powder. 8~15wt〇/〇; When the mixing is completed, the water-to-binder ratio of the medium-strength self-filling concrete is 〇27~ 〇·75', the volume of the slurry is 〇·29~〇.47m3, and the volume ratio of the water powder is 0.56~ 1.36 〇The above-mentioned medium-strength self-filling concrete has good slump diffusion value, free tamping, high fluidity and self-filling gap. It can be completely used by concrete without applying vibration and compaction during the pouring process. Gravity itself fills the gap between the steel bars and the template. The use of medium-strength self-filling concrete 200800833 is unclear, revealing the type of strong plasticizer, only the amount of strong use of the different types of powder is G.8~L5wt%. Therefore, the variation of the strong plasticizer is too large' It is easy to cause the strength of the towel to be self-contained. The concrete can not achieve the above characteristics as expected. Moreover, the amount of the self-filling concrete material (the hearth powder, fly ash and money) is only about 80% of the cement. 'The water quantity is still too much, which is not conducive to the relative reduction of concrete blending cost. For the above reasons, it is necessary to further improve the medium-strength self-filling concrete.

In view of the above, the present invention improves the above-mentioned disadvantages by using a specific ratio of coarse aggregate, fine aggregate, powder, water and plasticizer and a specific proportion of water gel per cubic meter of concrete. The plasticizer is obtained from more than one type of high fluidity new water reducing agent, and the length, molecular weight, molecular density and/or specific heat of the main surface and side carbon chain of the water-reducing main surface and side by more than one different type of high flow mirror The physicochemical property f, (10) changes its water-reducing characteristics and the maintenance of the discrimination, and the high-flow secret, high water-tightness, high anti-separation, loss of the forest, low floating rate, and extra water addition in the land are obtained. SUMMARY OF THE INVENTION The main object of the present invention is to provide a high-flowing concrete comprising a plasticizer, which is obtained from a high-fluidity new water-reducing agent of more than one kind, and a sub-type of more than The main carbon chain and side carbon material recording of the high-flow ship water reducing agent make the tree liquid have the fluidity of the concrete. A secondary object of the present invention is to provide a T% flowing concrete which has a specific proportion of coarse aggregate, fine aggregate, powder, mixing water and a strong plasticizer, and has a compressive strength of 168 kg/ From cm2 to 436 kg/cm2, the present invention has the effect of improving the compressive strength of concrete. Another object of the present invention is to provide a high-flow concrete having a specific ratio of water-to-binder ratio, and the amount of the material of the wind is greater than the amount of cement, so that the invention has the effect of reducing the amount of cement and the cost of concrete blending, according to the present invention. The high-flow concrete, the ratio of the system contains • coarse aggregates per cubic meter, the amount is between 7〇〇kg/m3 and 850kg/m3; the fine aggregate, the amount is between 850kg/m3 and 1050kg/m3 Between the powder, the amount is between 330kg/m3 and 420kg/m3; the mixing water is between 175kg/m3 and 195kg/m3, and the strong plasticizer is used in an amount of 4.〇kg Between /m3 and 5.0kg/m3, and the overall water-to-binder ratio is between 〇42 and 〇55. The plasticizer is obtained from more than one high-flowing carboxylic acid water-reducing agent, and the length, molecular weight, molecular density and/or the main carbon chain and the side carbon chain of the different types of high-flowing reductive water reducing agents of different types and/or Physicochemical properties such as specific heat coefficient to change its water-reducing characteristics and temperature maintenance. The above and other objects, features, and advantages of the present invention will become more <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; As shown in Table 1, the high flow concrete of the preferred embodiment of the present invention comprises a coarse aggregate, a fine aggregate, a powder, a mixing water, and a strong plasticizer. The coarse aggregate is selected from the group consisting of gravel 200800833 [cmshedstone] and/or pestone with an average particle size of less than 3/4 inch, but may also be selected according to the different spacing of the steel bars. The coarse aggregate is used to avoid the gap between the adjacent steel bars due to the coarse aggregate during the grouting, thereby preventing the bridging phenomenon. In the concrete per cubic meter [m3], the amount of the coarse aggregate is preferably between 700 kg/m3 and 850 kg/m3, for example, the amount of coarse aggregate of 78 〇, 79 〇 or 800 kg/m 3 may be selected. Compared with the embodiment, the high flow jg ▲ charm enemy ratio 〇 product specifications _ water glue ratio W / B ° / 〇 fell and water water kg / m3 total cement ^ cementing kg / m3 cement cement kg / m3 furnace stone powder slag Kg/m3 fly ash fly ash kg/m3 2102510R 53 185 350 150 200 245251OR ΛΟΓνΛΠΙ ΑΓ\ 53 185 350 160 190 280251OR 51 185 ~~360~ 170 190 350251OR 46 185 ~'400~~ 200 200 2102510S 51 185 360 150 110 100 2452510S 51 185 360 160 110 90 2802510S 49 185 380 ~ Π 0~ 110 100 3502510S 46 185 400 200 ~ Ϊ 20~ 80 Table 2J continued] High flow coagulation of a preferred embodiment of the invention. Σα specification coarse aggregate coarse aggregate aggregate kg/m3 fine aggregate fine aggregate kg/m3 fine aggregate rate S/A °/〇 strong plastic agent super-plast icizer kg/m3 unit weight UW kg/m3 2102510R 780 996 56. 5 4. 20 2311 2452510R 780 996 56.5 4. 20 2311 280251OR 800 968 55.2 4.32 2313 3502510R 800 934 ~~543~~ 4. 80 2319 210251OS 790 980 ~~55^ 4.32 2315 245251OS 790 980 55.8 4.32 2315 280251OS 790 960 55.3 4. 56 2315 3502510S 790 940 54.8 4. 80 2315 Referring again to Table 1, the fine aggregate (200800833 fine aggregate) of the preferred embodiment of the present invention is preferably selected from sand materials such as sand, for example Take it from river sand and so on. Furthermore, based on the consideration of the ratio stability, the fineness modulus (FJV[] can be subdivided into coarse sand [fineness modulus: 3.7~3·1], medium sand [fineness modulus). ···3·3~3.0] and fine sand [fineness modulus: 2.2~1.6], and select at least one according to the needs of use. In the mixed spine of the mother cubic meter [m], the amount of the fine aggregate is preferably between 850 kg/m3 and 1050 kg/m3, for example, 996, %8, 934, 980, 960 or 940 kg/m3 may be selected. The amount of fine aggregate used. Furthermore, the ratio of the amount of the fine aggregate to the coarse aggregate is preferably controlled to be between 〇.54 and 〇57. Referring to Table 1, the powder of the preferred embodiment of the present invention mainly comprises cement (binder) such as cement and Pozzolans, and further comprises chrysotile powder. [slag], fly ash, volcanic ash ~ gamma (5) P〇zz〇lans] and / or silica fume, which contains oxidized stone, alumina, iron oxide and / or aluminate The composition can react with calcium hydroxide to form a calcium citrate compound with cementation properties, so it can be used to replace part of the cement. In every cubic meter [m3] of concrete, the total use of the powder! [ie, total cementing, cementing] is preferably between 330kg/m3 and 420kg/m3, wherein the amount of the cement is preferably between (10) and, for example, between 3 and 21 〇kg/m3, and the amount of the whetstone is preferably between l 〇〇 kg / m3 to 210kg / m3, and the amount of the fly ash is preferably between 7 〇 kg / m3 to ll 〇 kg / m3. For example, you can choose to use 15〇, 16〇, 17〇 or 2〇〇kg/m3 of cement, choose to use 110, 120, 190 or 200kg/m3 of the hearthstone, and choose to use 80, 90 or lOOkg. /m3 fly ash usage. 200800833 Optional: The invention is more than the amount of cement, and then ===cost. For example, 'by selecting the appropriate strong _, you can choose the ig times to the amount of the cement. 'Example: i.33 times, U9 times, U2 times, 1 () times, 14 times, 1.25 times or ι·24 times, etc.

Please refer to the table - as shown in the table below. 'The hair and water should be as free of chloride, sulfate, organic impurities, grease or other substances harmful to structural strength. The amount of scale and water is preferably between 175 kg/m3 and 195 kg/m3, for example, 185 kg/m^ of mixed water can be used. Furthermore, the water-to-binder ratio (bribery r/binder) is preferably controlled to be between 0.42 and 0.55. For example, the water-to-binder ratio can be selected to be 〇53, 〇51, 0.46 or 0.49.

Referring again to Table 1, the superplasticizer (superplasticizer or superplasticiser) of the preferred embodiment of the present invention is preferably obtained from more than one high-flowing carboxylic acid water reducing agent [high_range earb〇xyl water]. The molecular formula of the south fluidity Wei acid water reducing agent is as follows...

Wherein R represents an alkyl group; X and γ represent a hydrogen atom 200800833, or other functional group; Z represents a carbon atom or other functional group; and A〇 represents an oxyalkylene group. Further, a and b are selected from integer values such as 1, 2, 3, ..., η, and the like. The high-flowing carboxylic acid water reducing agent has high performance water repellency, high fluidity, low hanging loss, high workability and the like. Furthermore, by different types: high-flow carboxylic acid water reducing agent, the main carbon chain and the side carbon chain length, molecular weight, molecular density and / or specific heat coefficient and other physicochemical properties, can change its water-reducing characteristics and 坍 #麟Sex and other nature. In a preferred embodiment of the invention, the high flow repellent water reducing agent is preferably selected from the group consisting of commercially available high flow carboxylic acid water reducing agents such as AKf, ekk, srii and/or S100. In addition, in the case of high-flow concrete per cubic meter, the amount of the plasticizer is between 40 kg/m3 and 5.0 kg/m3, for example: 4.20 kg/m3, 4.32 kg/m3, 4.80 kg/m3 or 4.56. Kg/m3 and so on. Referring to Figure 1, there is disclosed a process for preparing a high flow concrete according to a preferred embodiment of the present invention. First, the cement is transported from a bulk cement store to a storage tank. The amount of cement must be such that the subsequent concrete meets the 3, 7 and 28 days pressure strength standards. Next, the grit powder [and fly ash] is transported from the 1 ton ton storage tank to the hopper, and the residue is screened out using a #325 mesh screen. Next, the buckle is transported from the stock of the aggregate to the sub-point === the storage tank. The fine aggregate must first pass through the control sieve analysis, the mud content %, the fineness modulus (FM), the chlorine (C1-) content and the surface moisture content %, and the coarse aggregate must also be analyzed by the control sieve. And the amount of mud, etc. Next, the cement, hearth powder, fly ash, fine aggregate and coarse bone: ς 11 200800833, stir in the bedding trough, and control the proportion of the amount of the computer ingredients. The supplier's mixes the mixing water from the rich man to the above mixture, and adds one or more of the strong plasticizers (i.e., chemical admixtures) to the above mixed ingredients. The mixing water must first be controlled by quality such as pH and chlorine (cr) content, and the plasticizer must first control the pH, specific gravity, water reduction rate, strength coefficient, solid content and chlorine (cr) content. control. Please refer to Fig. 1 again, after the mixing water and the strong plasticizer are added to the mixed ingredients of the cement, the furnace stone powder, the fly ash, the fine aggregate and the coarse aggregate, and then sequentially mixed and blended into a concrete. [RMC] storage tank, finally, the concrete is delivered to the client by a pre-mixer. At this time, the concrete in the concrete storage tank must control the turbulence and the unit volume weight, and the concrete in the premixed vehicle must also control the turbulence. Referring to Tables 2, 3, 4 and 5, the mechanical properties of the flowable mixed soil of the preferred embodiment of the present invention are disclosed. As shown in Table 2, the present invention can preset the compressive strength of high-flow concrete to '245, 280, 350 kg/cm2 or other preset values by the amount of cement used. The initial turbulence of the above-mentioned various compressive strength concretes is between 57cm and 58cm, and the construction turbulence (60 minutes) is between 55 (: 111 to 58 (^1^, maximum particle size control). In the range of 10~20mm, the air content is between 15% and 3·0/〇, the average compressive strength in 7 days is between i68kg/cm2 and 308kg/cm2' and the average compressive strength in 28 days is 276kg/ From cm2 to 436kg/cm2. Further, as shown in Table 3, the high-flow concrete of the present invention has a considerable degree of twist compared to general concrete, conventional high-work concrete, and conventional medium-strength self-filling concrete. Fluidity. As shown in Tables 4 and 5, 12 200800833 ===::° and 60 minutes change -

Sa time "minute ~ ' / again, Ai _ _ ^ minutes UL UII1 J ° 60 minutes 1 concrete 20 __17 14 1 invention high flow concrete 26 26 26 Table 5, the high flow concrete of the present invention Sang S Cm] elapsed time 0 minutes minute 60 minutes high-flow concrete of the present invention 58 _ 58 58 As described above, the type of the strong plasticizer is not clearly revealed compared to the conventional medium-strength self-filling concrete, and the amount of the material of the wind is only at most equal to Water 13 200800833 80% of the mud consumption is not conducive to the relative reduction of the cost of the concrete. The invention of Figure 1 uses the coarse aggregate in the concrete per cubic meter, which is between 700kg/m3. 85〇kg/m3; fine aggregate, the amount is between 850kg/m3 and 1050kg/m3; powder, the amount is between 330kg/m3 and 420kg/m3; mixing water, the amount is between Between 175kg/m3 and 195kg/m3, and a strong plasticizer, the amount is between 4〇kg/m3 and 5.0kg/m3, and the overall water-to-binder ratio is controlled to between 〇42 and 〇.55. between. More than one of the plasticizers is obtained from a high-flowing carboxylic acid water-reducing agent, having a length, a molecular weight, a molecular density, and/or a main carbon chain and a side carbon chain of one or more different types of high-flowing carboxylic acid water reducing agents. Physicochemical properties such as specific heat coefficient to change the water-reducing characteristics and the maintenance of the twist. The concrete has a compressive strength of from 168 kg/cm2 to 436 kg/cm2. Thereby, the concrete of the present invention is further provided with high fluidity characteristics such as high fluidity, high water pressure, high anti-separation, (4), low ocean water rate, and additional water addition on the construction site. Furthermore, since the amount of materials (hearthstone, fly ash, etc.) is greater than the amount of cement, the invention can effectively reduce the amount of cement and the cost of concrete blending. The present invention has been disclosed by the above-described preferred embodiments, and it is not intended to limit the invention, and any skilled person in the art can make various changes and modifications within the scope of the invention. The scope of protection is subject to the definition of the scope of the patent application attached. 14 200800833 [Simple description of the drawings] Fig. 1 is a flow chart showing the preparation of high-flow concrete according to a preferred embodiment of the present invention. [Main component symbol description] None

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Claims (1)

200800833 X. Patent application garden: 1. A high-flow concrete with a matching system containing cubic meters per cubic meter. The amount is between 700kg/m3 and between. The fine aggregate is used at 850kg/m3. To 1〇5()]^/ιη3&lt;^ powder' is used between 330kg/m3 and 42〇kg/m3 · mixing water' is between 175kg/m^l95kg/m3; The amount of the agent is between 4.0kg/m3 and 5.〇kg/m3; and the water-to-binder ratio of the concrete in the whole is between 〇42 and 〇55, and the plasticizer is obtained from the above-mentioned high Mobility_reducing agent 曰, borrowing ^ The physicochemical properties of the main chain and side carbon chain of one or more different types of high-flowing carboxylic acid water reducing agent to change its water-reducing characteristics and enthalpy The high-flowing concrete according to the above item, wherein the length, molecular weight, molecular density or specific heat coefficient of the main chain and the side carbon chain of one or more different types of high-flowing carboxylic acid water reducing agents are changed Characteristics and maintainability. 3. The high-flowing concrete according to item i of the patent application scope, wherein the concrete has a compressive strength of 168 kg/cm2 to 436 kg/cm2 〇^4, = high-flow concrete according to the scope of the patent application, Wherein the monthly material is selected from the group consisting of gravel and pebbles having an average particle diameter of less than 3/4 〜, at least ～5, high-flow concrete according to the patent application scope β, and the aggregate material is selected from the group consisting of sand materials. 6. The high-flow concrete according to item 1 of the patent application scope, in which the money is fine 16 200800833 • The ratio of the amount of aggregate to the coarse aggregate is between 0·54 and 〇·57. 7. The high flow concrete of claim 1, wherein the powder system comprises cement and at least one of the materials. 8. The high-flowing concrete according to item 7 of the patent application scope, wherein the amount of the cement is between 140 kg/m3 and 210 kg/m3. 9. The high-flowing concrete according to item 7 of the patent application scope, wherein the material of the wind is selected from the group consisting of furnace stone powder, fly ash, volcanic ash and Shishi ash. 10 according to claim 9 High flow concrete, wherein the gangue powder is used in an amount of between 1 〇〇kg/m3 and 21 Okg/m3. U. The high flow concrete according to claim 9 of the patent application, wherein the amount of the fly ash is between 70 kg/m3 and ll〇kg/m3. 12. The high-flowing concrete according to item 7 of the patent application scope, wherein the amount of the material is greater than the amount of the cement to relatively reduce the amount of cement. 10 13 'Essence, the high-flow concrete described in Item 12, wherein the amount of the material used is between 1 and 4 times the amount of the cement. · 17