JPS6327300B2 - - Google Patents
Info
- Publication number
- JPS6327300B2 JPS6327300B2 JP57169730A JP16973082A JPS6327300B2 JP S6327300 B2 JPS6327300 B2 JP S6327300B2 JP 57169730 A JP57169730 A JP 57169730A JP 16973082 A JP16973082 A JP 16973082A JP S6327300 B2 JPS6327300 B2 JP S6327300B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- strength
- cement
- fluidity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000003638 chemical reducing agent Substances 0.000 claims description 17
- 239000004570 mortar (masonry) Substances 0.000 claims description 16
- 239000004576 sand Substances 0.000 claims description 16
- 239000000377 silicon dioxide Substances 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000011398 Portland cement Substances 0.000 claims description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 7
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 7
- 239000004571 lime Substances 0.000 claims description 7
- 239000010419 fine particle Substances 0.000 claims description 5
- 238000004898 kneading Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 description 23
- 239000000463 material Substances 0.000 description 15
- 239000004568 cement Substances 0.000 description 14
- 230000000704 physical effect Effects 0.000 description 7
- 229910004261 CaF 2 Inorganic materials 0.000 description 5
- 238000009472 formulation Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical group O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
本発明は夏期高温時に施工される無収縮性高流
動高強度モルタルに関するものである。
プレハブ建築物などの構造物の接合部に充填し
て構造材相互を一体化するために、プレミツクス
タイプの無収縮性高流動高強度モルタル（以下、
高強度モルタルと略称する）が使用されている。
夏期高温時に施工される場合、高強度モルタル
の練上り温度が30℃を超えると時間の経過に伴な
い流動性が著しく低下し、充填作業が困難とな
る。しかしながら、混練水を多くしたり、混練後
に加水することによつて流動性の低下を回復させ
ることは材料の分離、強度低下および収縮の増加
を生じさせることになり、好ましい方法ではな
い。
本発明は高強度モルタルの夏期高温時施工にお
けるこのような問題点を解決するためなされたも
のである。
本発明の高強度モルタルの配合組成は以下の通
りである。
(1) ポルトランドセメント 100重量部
(2) 石灰系特殊膨張材 ５〜10 〃
(3) 高性能減水剤 1.0〜2.0 〃
(4) 硅砂 90〜150 〃
ここに石灰系特殊膨張材とは、遊離CaO15〜60
重量％、遊離CaF25〜30重量％、11CaO・
7Al2O3・CaF230〜80重量％および他の成分10重
量％以下を含有するクリンカ粉砕物、または、遊
離CaO15〜60重量％、遊離CaF25〜30重量％、
11CaO・7Al2O3・CaF230〜80重量％、および他
の成分10重量％以下を含有するクリンカと石こう
との混合粉砕物からなり、その混合粉砕物に含ま
れるCaSO4／Al2O3の重量比が1.0〜3.5の範囲に
あるものである。
石灰系特殊膨張材は高強度モルタルに生じる収
縮を防止するために配合されるものであり、その
配合量が上記(2)に示した範囲より少ないときは収
縮補償が不充分であり、多いときは高温時の流動
性が損われる。
高性能減水剤は高強度モルタルの高流動性を確
保するため、メラミンホルマリン樹脂スルフオン
酸塩系減水剤であり、ポルトランドセメントに対
して1.0〜2.0％重量割合で使用される。高温時は
ポルトランドセメントの使用量（単位量に占める
割合）を強度が確保される範囲でできる限り少な
くするため、高性能減水剤の配合が２％を超える
と過剰添加のため凝結遅延となり硬化不良の現象
が生じる。１％より少ないときは高流動性が得ら
れない。
0.3mm以下の微粒分の多い硅砂は材料分離、過
度のフリージングを防止できる。高温時に加水に
よらず流動性を高めるためには、ポルトランドセ
メントに対する硅砂の配合割合を増すことが必要
であり、その配合量が上記(4)に示した範囲より少
ないときは、高流動性を得るための水量が多くな
り、収縮の増加、材料の分離、強度低下の原因と
なる。また、(4)の範囲より多いときは高強度が確
保できない。
以下、本発明の具体的な実施例について説明す
る。
種々実験を重ねた結果、本発明の製品である無
収縮性高流動高強度モルタルは、膨張材、高性能
減水剤および硅砂の微粒分の重量部（配合）の割
合を種々変えたモルタル材と比較したところ、そ
の物性において最も優れたものであることがわか
つた。
その比較結果を第１表に示す。
第１表において本発明の無収縮性高流動高強度
モルタルは、配合NO.13に示すものである。
The present invention relates to a non-shrinkable, high-flow, high-strength mortar that is applied during high temperatures in summer. Premix-type non-shrinkable, high-flow, high-strength mortar (hereinafter referred to as
(abbreviated as high-strength mortar) is used. When construction is carried out during high summer temperatures, if the kneading temperature of high-strength mortar exceeds 30°C, the fluidity of the high-strength mortar will decrease significantly over time, making filling work difficult. However, recovering the decreased fluidity by increasing the amount of kneading water or adding water after kneading is not a preferable method because it causes separation of the materials, decrease in strength, and increase in shrinkage. The present invention has been made to solve these problems in the construction of high-strength mortar at high temperatures in summer. The composition of the high-strength mortar of the present invention is as follows. (1) Portland cement 100 parts by weight (2) Lime-based special expansive material 5-10 (3) High-performance water reducing agent 1.0-2.0 (4) Silica sand 90-150 CaO15~60
wt%, free CaF2 5-30 wt%, 11CaO・
7Clinker pulverized product containing 30-80% by weight of Al 2 O 3 · CaF 2 and 10% by weight or less of other components, or 15-60% by weight of free CaO, 5-30% by weight of free CaF 2 ,
It consists of a mixed pulverized product of clinker and gypsum containing 30 to 80% by weight of 11CaO・7Al 2 O 3・CaF 2 and 10% by weight or less of other components, and the CaSO 4 /Al 2 O contained in the mixed pulverized product The weight ratio of 3 to 3 is in the range of 1.0 to 3.5. The lime-based special expansive material is blended to prevent shrinkage that occurs in high-strength mortar, and if the blended amount is less than the range shown in (2) above, the shrinkage compensation is insufficient; The fluidity at high temperatures is impaired. The high-performance water reducer is a melamine-formalin resin sulfonate-based water reducer and is used at a weight ratio of 1.0 to 2.0% based on Portland cement in order to ensure high fluidity of high-strength mortar. At high temperatures, the amount of Portland cement used (as a percentage of the unit amount) is kept as low as possible while maintaining strength, so if the amount of high-performance water reducer exceeds 2%, setting will be delayed due to excessive addition, resulting in poor hardening. The following phenomenon occurs. When it is less than 1%, high fluidity cannot be obtained. Silica sand with a high content of fine particles of 0.3 mm or less can prevent material separation and excessive freezing. In order to increase fluidity without adding water at high temperatures, it is necessary to increase the blending ratio of silica sand to Portland cement.If the blending amount is less than the range shown in (4) above, high fluidity cannot be achieved. More water is required to be obtained, causing increased shrinkage, material separation, and reduced strength. Moreover, when the amount exceeds the range (4), high strength cannot be ensured. Hereinafter, specific examples of the present invention will be described. As a result of various experiments, we have found that the non-shrinkable, high-flow, high-strength mortar, which is the product of the present invention, is made by combining mortar materials with various proportions by weight (mixture) of expanding agents, high-performance water reducing agents, and fine particles of silica sand. When compared, it was found to be the one with the best physical properties. The comparison results are shown in Table 1. In Table 1, the non-shrinkable, high-flow, high-strength mortar of the present invention is shown in formulation No. 13.
【表】【table】
【表】
(1) 膨張材の添加量
配合NO.1〜４はセメント、減水剤および硅
砂の重量部を一定にして膨張材の重量部を変化
させた場合の物性を示す。
配合NO.1は膨張材をセメントに対して４
％混入したものであるがこの配合はフロー値
（流動性）が304mmであつて材料分離の傾向が
多少認められる。また、膨張率についてみる
と若干の収縮が認められた。
配合NO.4は膨張材をセメントに対して11
％混入したものであるが、この配合は多少膨
張が大きく、強度が低い。
配合NO.2およびNO.3は膨張材をセメント
に対して５％および10％混入したものである
が、この範囲の膨張材量では良好な物性を示
した。
(2) 高性能減水剤の添加量
配合NO.5〜８はセメント、膨張材および硅
砂の重量部を一定にして減水剤の重量部を変化
させた場合の物性を示したものである。
配合NO.5は減水剤をセメントに対して0.5
％混入した場合であるが、この配合は流動性
が悪い。
配合NO.8は減水剤をセメントに対して2.5
％混入したものであるが流動性が過剰となり
材料分離が生じた。
配合NO.6およびNO.7は減水剤をセメント
に対して1.0％および2.0％混入したものであ
るが、いずれも良好な物性を示した。
(3) 硅砂の混入量
配合NO.9〜12はセメント、膨張材および減
水剤の重量部を一定にして硅砂の重量部を変化
させた場合の物性を示したものである。
配合NO.9は硅砂をセメントに対して80重
量部混入したものであるが、流動性が悪い。
配合NO.12は硅砂をセメントに対して160
重量部混入したものであるが、この配合は流
動性がやや悪く強度がやや低い。
配合NO.10およびNO.11は硅砂をセメント
に対して90重量部および150重量部混入した
ものであるが、いずれも良好な物性を示し
た。
以上の結果から、夏期高温時に最適な高強度モ
ルタルの配合は前記したように第１表の配合
NO.13すなわち、ポルトランドセメント100重量
部に対して、石灰系特殊膨張材５〜10重量部、高
性能減水剤1.0〜2.0重量部、硅砂90〜150重量部
であると考えられる。
なお、上記第１表において、セメントは宇部普
通ポルトランドセメント、膨張材は石灰系特殊膨
張材（クリンカ組成：遊離石灰43％、遊離
CaF213％、11CaO・7Al2O3・CaF240％、石こう
添加量：膨張材中のCaSO4／Al2O3の重量比3.3）、
高性能減水剤は昭和電工株式会社製メルメント
F10、硅砂は0.3mm以下の微粒分を25.8％含んだも
のを使用した。
なお、その配合は、セメント100重量部に対し
膨張材6.25重量部、高性能減水剤1.5重量部、硅
砂145重量部の割合である。
本発明の製品は第１表に示すように、流動性を
示すフロー値が大きく、かつ膨張率が小さく、圧
縮強度が極めて大きいので、付着性能が高く、流
し込みによる充填性が優れており、現場における
作業性に優れ、充填部もコンクリートおよび鉄筋
とよくなじむことができる。
つぎに、本発明の製品と市販の製品とを比較し
た結果を第２表に示す。[Table] (1) Addition amount of expanding material Blends No. 1 to 4 show the physical properties when the weight parts of cement, water reducing agent and silica sand are kept constant and the weight parts of expanding material are varied. Mixture No. 1 is an expansion agent of 4 to cement.
%, the flow value (fluidity) of this formulation is 304 mm, and there is a slight tendency for material separation. Furthermore, when looking at the expansion rate, some shrinkage was observed. Mixture No. 4 has an expansion agent of 11% compared to cement.
%, but this formulation has somewhat large expansion and low strength. Blends No. 2 and No. 3 contained 5% and 10% of the expanding agent based on the cement, and showed good physical properties within this range of expanding agent amount. (2) Addition amount of high performance water reducing agent Blends No. 5 to 8 show the physical properties when the weight parts of the cement, expansive material and silica sand are kept constant and the weight parts of the water reducing agent are varied. Mixture No.5 has a water reducing agent of 0.5 to cement.
%, but this formulation has poor fluidity. Blend No.8 has a water reducing agent of 2.5 to cement.
%, but the fluidity was excessive and material separation occurred. Mixtures No. 6 and No. 7 contained water reducing agents at 1.0% and 2.0% based on the cement, and both showed good physical properties. (3) Mixed amount of silica sand Blend Nos. 9 to 12 show the physical properties when the weight parts of silica sand are varied while the weight parts of cement, expanding agent, and water reducing agent are kept constant. Blend No. 9 contains 80 parts by weight of silica sand and cement, but has poor fluidity. Mixture No. 12 is 160% of silica sand to cement.
However, the fluidity of this formulation is rather poor and the strength is rather low. Blends No. 10 and No. 11 contain 90 parts by weight and 150 parts by weight of silica sand based on cement, and both showed good physical properties. Based on the above results, the optimal high-strength mortar composition for high-temperature summers is as shown in Table 1.
No. 13 That is, it is thought that 5 to 10 parts by weight of lime-based special expansive material, 1.0 to 2.0 parts by weight of high performance water reducing agent, and 90 to 150 parts by weight of silica sand are added to 100 parts by weight of Portland cement. In Table 1 above, the cement is Ube ordinary Portland cement, and the expanding material is lime-based special expanding material (clinker composition: 43% free lime, free
CaF 2 13%, 11CaO・7Al 2 O 3・CaF 2 40%, gypsum addition amount: weight ratio of CaSO 4 /Al 2 O 3 in expanding material 3.3),
The high-performance water reducing agent is Melment manufactured by Showa Denko Co., Ltd.
F10, silica sand containing 25.8% of fine particles of 0.3 mm or less was used. The composition is 6.25 parts by weight of expanding agent, 1.5 parts by weight of high performance water reducer, and 145 parts by weight of silica sand per 100 parts by weight of cement. As shown in Table 1, the product of the present invention has a large flow value indicating fluidity, a small expansion coefficient, and an extremely high compressive strength, so it has high adhesion performance, excellent filling properties by pouring, and It has excellent workability and the filling part can blend well with concrete and reinforcing steel. Next, Table 2 shows the results of a comparison between the products of the present invention and commercially available products.
【表】
第２表から明らかなように本発明の製品は、流
動性を示すフロー値が混練直後においても、また
60分経過後においても、従来品（市販の製品）よ
りも極めて大きく、従来品よりも優れた流動性を
示すことがわかる。
また、材令７日における膨張率を比較してみて
もやや小さく、無収縮性を確保することができ
る。
さらに、材令28日における圧縮強度を比較して
みても865Kg／cm2と極めて高く、充填部における
コンクリートおよび鉄筋との付着強度が大きい高
強度モルタルであることがわかる。
以上の説明から明らかなように本発明によれ
ば、ポルトランドセメントに石灰系特殊膨張材と
高性能減水剤および微粒子を多く含んだ硅砂を混
入することにより高強度で高流動性を保ち、無収
縮性の高強度モルタルを得ることができる。[Table] As is clear from Table 2, the product of the present invention has a flow value indicating fluidity even immediately after kneading.
It can be seen that even after 60 minutes, it was significantly larger than the conventional product (commercially available product) and exhibited superior fluidity than the conventional product. Further, when comparing the expansion rate at 7 days of age, the expansion rate is rather small, and non-shrinkage can be ensured. Furthermore, when comparing the compressive strength at 28 days old, it is extremely high at 865 Kg/cm 2 , indicating that it is a high-strength mortar with high adhesion strength to concrete and reinforcing bars in the filled part. As is clear from the above explanation, according to the present invention, by mixing a lime-based special expansive agent, a high-performance water reducing agent, and silica sand containing a large amount of fine particles into Portland cement, it maintains high strength and fluidity, and is non-shrinkable. It is possible to obtain high-strength mortar with high strength.
Claims (1)
灰系特殊膨張材を５〜10重量部、高性能減水剤を
1.0〜2.0重量部、0.3mm以下の微粒分を20〜30％含
有する硅砂を90〜150重量部ほど混入して練合せ
たことを特徴とする無収縮性高流動高強度モルタ
ル。1 For 100 parts by weight of Portland cement, add 5 to 10 parts by weight of lime-based special expanding agent and high-performance water reducer.
A non-shrinkable, high-flow, high-strength mortar characterized by mixing and kneading approximately 90 to 150 parts by weight of silica sand containing 1.0 to 2.0 parts by weight and 20 to 30% of fine particles of 0.3 mm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16973082A JPS5964555A (en) | 1982-09-30 | 1982-09-30 | Non-shrinkage high fluidity high strength mortar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16973082A JPS5964555A (en) | 1982-09-30 | 1982-09-30 | Non-shrinkage high fluidity high strength mortar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5964555A JPS5964555A (en) | 1984-04-12 |
| JPS6327300B2 true JPS6327300B2 (en) | 1988-06-02 |
Family
ID=15891782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16973082A Granted JPS5964555A (en) | 1982-09-30 | 1982-09-30 | Non-shrinkage high fluidity high strength mortar |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5964555A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61214930A (en) * | 1985-03-15 | 1986-09-24 | Denki Kagaku Kogyo Kk | Constructional element for machine tool |
| CN107572982A (en) * | 2017-10-18 | 2018-01-12 | 北京建工路桥工程建设有限责任公司 | A kind of ultra-long concrete mixture and its construction method for pouring wall |
| CN110498632A (en) * | 2019-08-23 | 2019-11-26 | 广西筑盟建材有限公司 | Five expansion sources ultra-high performance concrete swelling agents |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5412934A (en) * | 1977-06-27 | 1979-01-31 | Nippon Telegr & Teleph Corp <Ntt> | Go end device for communication |
| JPS5684358A (en) * | 1979-12-14 | 1981-07-09 | Onoda Cement Co Ltd | Cementitious self leveling floor material |
| JPS5727861A (en) * | 1980-07-28 | 1982-02-15 | Sanyo Kokusaku Pulp Co Ltd | Automatic dividing tape insertion method and device |
-
1982
- 1982-09-30 JP JP16973082A patent/JPS5964555A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5412934A (en) * | 1977-06-27 | 1979-01-31 | Nippon Telegr & Teleph Corp <Ntt> | Go end device for communication |
| JPS5684358A (en) * | 1979-12-14 | 1981-07-09 | Onoda Cement Co Ltd | Cementitious self leveling floor material |
| JPS5727861A (en) * | 1980-07-28 | 1982-02-15 | Sanyo Kokusaku Pulp Co Ltd | Automatic dividing tape insertion method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5964555A (en) | 1984-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5547374B2 (en) | Injection material | |
| JPWO2007138648A1 (en) | Injection material | |
| JPS6219388B2 (en) | ||
| CN109095802B (en) | Expansive agent for concrete, concrete and preparation method thereof | |
| JPS6327300B2 (en) | ||
| US4762561A (en) | Volume-stable hardened hydraulic cement | |
| JP2001294469A (en) | Ultra rapid hardening, non-shrinkage grout | |
| JP2005170710A (en) | Cement composition for grout and mortar composition for grout and grout material | |
| JPH11147746A (en) | Cement composition having reduced slump loss | |
| JP3051980B2 (en) | High-strength concrete lining method | |
| JPH0545538B2 (en) | ||
| JP7058913B2 (en) | Fast-hardening cement composition and fast-hardening mortar | |
| JPS6238314B2 (en) | ||
| JP2816860B2 (en) | Cement composition with adjusted particle size | |
| JPS61191552A (en) | Superhigh early strength cement composition | |
| JPH0515660B2 (en) | ||
| JPH11302060A (en) | Quick-hardening cellular mortar | |
| JPH0859319A (en) | Cement admixture and cement composition | |
| CN115650693B (en) | Magnesium phosphate repair mortar based on monoammonium phosphate and machine-made sand and preparation method thereof | |
| JPH0235699B2 (en) | ||
| JP2019059651A (en) | Hydraulic powder composition | |
| JP5383045B2 (en) | Cement composition for grout and grout material using the same | |
| JP2001048615A (en) | Cement admixture and cement composition using the same | |
| JP7158306B2 (en) | cement composite | |
| JPS6320789B2 (en) |