CN103833257A - Coagulating enhanced cement grinding aid - Google Patents
Coagulating enhanced cement grinding aid Download PDFInfo
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- CN103833257A CN103833257A CN201410115120.6A CN201410115120A CN103833257A CN 103833257 A CN103833257 A CN 103833257A CN 201410115120 A CN201410115120 A CN 201410115120A CN 103833257 A CN103833257 A CN 103833257A
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Abstract
The invention provides a cement grinding aid comprising the following components: 10-20wt% of organic coagulating materials comprising alcohol amine materials, calcium formate and polyacrylamide, 12-25wt% of inorganic coagulating materials comprising aluminum-containing materials, magnesium-containing materials and layered sodium silicate, and the balance of kieselguhr. The cement grinding aid provided by the invention comprises the organic coagulating materials and the inorganic coagulating materials which interact with each other, so that the obtained cement grinding aid can shorten the cement setting time and improve the strength of cement. In addition, the cement grinding aid provided by the invention can also improve the yield of the cement and reduce the power consumption for grinding, and can reduce the consumption of clinker and improve the consumption of industrial waste slag under the condition that the strength of the cement and the hourly output of a grinding machine are basically not changed.
Description
Technical field
The present invention relates to cement additive technical field, relate in particular to a kind of short solidifying enhanced cement grinding aid.
Background technology
Cement is indispensable a kind of material of construction in human lives and social production, use wide, consumption is many, have the title of " grain of building industry ", there is no a kind of material both at home and abroad at present and can substitute its status.Data shows according to statistics, and world architecture industry consumption of natural resource, the energy account for 40% of total resources, energy-output ratio.Due to the impact of waste gas, dust, waste water and noise, make Cement industry or the rich and influential family of environmental pollution.Meanwhile, the industry byproduct that the suitability for industrialized production of scale expanding day is accompanied by constantly produces and accumulation, has stores processor and destroys the problems such as ecotope.China gives off all kinds of solid-state trade wastes (industrial residue) such as a large amount of flyash, slag, phosphorus slag, slag every year, but the not enough half of its comprehensive utilization ratio.
For alleviating energy crisis, reduce environmental pollution, realize energy-saving and emission-reduction, at present, people have a mind industrial residue are applied in cement, have both solved the aftertreatment problem of industrial residue, have ensured again the source of cement raw material.But, due to mixing in a large number of industrial residue, can affect the intensity of cement, and the cement setting time having mixed after a large amount of industrial residues can extend, due to the impact of this two aspect, restrict the application of industrial residue in cement.
Summary of the invention
The object of the present invention is to provide a kind of cement grinding aid, the invention provides cement grinding aid and there is the short solidifying effect strengthening with mechanics, be beneficial to the application of industrial residue in cement.
The invention provides a kind of cement grinding aid, comprise following component:
The organic short solidifying class material of 10wt%～20wt%, described organic short solidifying class material comprises alcamines material, calcium formiate and polyacrylamide;
The inorganic short solidifying class material of 12wt%～25wt%, described inorganic short solidifying class material comprises aluminium-containing substance, contains magnesium material and lamina sodium silicate;
Surplus is diatomite.
Preferably, described alcamines material comprises trolamine and/or di-alcohol monoisopropanolamine.
Preferably, described aluminium-containing substance comprises one or more in Tai-Ace S 150, sodium metaaluminate and aluminum oxide;
The described magnesium material that contains comprises one or more in Magnesium Silicate q-agent, magnesium acetate, magnesium silicofluoride and magnesium sulfate.
Preferably, the mass content of described alcamines material in described cement grinding aid is 6wt%～10wt%.
Preferably, the mass content of described calcium formiate in described cement grinding aid is 3wt%～6wt%.
Preferably, the mass content of described polyacrylamide in described cement grinding aid is 1wt%～3wt%.
Preferably, the mass content of described aluminium-containing substance in described cement grinding aid is 5wt%～10wt%.
Preferably, described is 2wt%～5wt% containing the mass content of magnesium material in described cement grinding aid.
Preferably, the mass content of layered water glass in described cement grinding aid is 5wt%～10wt%.
The application of cement grinding aid in cement described in technique scheme, the consumption of described cement grinding aid in described cement is 0.3wt%～0.5wt%.
The invention provides a kind of cement grinding aid, comprise the organic short solidifying class material of following component: 10wt%～20wt%, described organic short solidifying class material comprises alcamines material, calcium formiate and polyacrylamide; The inorganic short solidifying class material of 12wt%～25wt%, described inorganic short solidifying class material comprises aluminium-containing substance, contains magnesium material and lamina sodium silicate; Surplus is diatomite.Cement grinding aid provided by the invention comprises organic short solidifying class material and inorganic short solidifying class material, in the present invention, described organic short solidifying class material and inorganic short solidifying class matter interaction, make the cement grinding aid obtaining can improve the time of cement setting, and improved the intensity of cement.In addition, cement grinding aid provided by the invention can also improve output, the saving grinding pow consumption of cement, in the situation that ensureing that strength of cement and mill hourly output are substantially constant, can reduce the consumption of grog, improves the consumption of industrial residue.Experimental result shows, the folding strength that cement grinding aid provided by the invention makes to shorten 50～80min, 3d the time of coagulation of cement can improve 12%, the folding strength of 28d can improve 8.6%, the ultimate compression strength of 3d can improve 21.25%, the ultimate compression strength of 28d has improved 14.2%; Can improve cement output more than 15%, save grinding pow consumption more than 15%; Ensure, in strength of cement and the substantially constant situation of mill hourly output, can reduce by 8%～10% grog, multiplex 8%～10% industrial residue.
Embodiment
The invention provides a kind of cement grinding aid, comprise following component:
The organic short solidifying class material of 10wt%～20wt%, described organic short solidifying class material comprises alcamines material, calcium formiate and polyacrylamide;
The inorganic short solidifying class material of 12wt%～25wt%, described inorganic short solidifying class material comprises aluminium-containing substance, contains magnesium material and lamina sodium silicate;
Surplus is diatomite.
Cement grinding aid provided by the invention can shorten the time of cement setting, improves the consumption of industrial residue, and can improve the mechanical strength of cement.Cement grinding aid provided by the invention has the dual function that promotes hydrated cementitious to shorten time of coagulation and increase its intensity concurrently, can give full play to industrial residue lateral reactivity or gelling, regulate time of coagulation, be conducive to a large amount of utilizations of industrial residue in cement concrete.
Cement grinding aid provided by the invention comprises the organic short solidifying class material of 10wt%～20wt%, is preferably 12wt%～18wt%, more preferably 14wt%～16wt%; In the present invention, described organic short solidifying class material comprises alcamines material, calcium formiate and polyacrylamide;
In the present invention, described alcamines material is preferably trolamine and/or di-alcohol monoisopropanolamine; The mass content of described alcamines material in described cement grinding aid is preferably 6wt%～10wt%, and more preferably 6wt%～8wt%, most preferably is 7wt%～8wt%;
In the present invention, the mass content of described calcium formiate in described cement grinding aid is preferably 3wt%～6wt%, more preferably 4wt%～5wt%;
In the present invention, the mass content of described polyacrylamide in described cement grinding aid is preferably 1wt%～3wt%, more preferably 2wt%～3wt%.
Cement grinding aid provided by the invention comprises the inorganic short solidifying class material of 12wt%～25wt%, is preferably 14wt%～23wt%, and more preferably 16wt%～21wt%, most preferably is 18wt%～19wt%; In the present invention, described inorganic short solidifying class material comprises aluminium-containing substance, contains magnesium material and lamina sodium silicate;
In the present invention, described aluminium-containing substance preferably includes one or more in Tai-Ace S 150, sodium metaaluminate and aluminum oxide, more preferably comprises one or both in Tai-Ace S 150, sodium metaaluminate and aluminum oxide; The present invention does not have special restriction to the source of described aluminium-containing substance, adopts the aluminium-containing substance of mentioned kind well known to those skilled in the art, and as aluminum oxide can adopt calcining bauxitic clay, concrete can be the commercial goods of calcining bauxitic clay.In the present invention, the mass content of described aluminium-containing substance in described cement grinding aid is preferably 5wt%～10wt%, and more preferably 6wt%～9wt%, most preferably is 7wt%～8wt%;
In the present invention, the described magnesium material that contains preferably includes one or more in Magnesium Silicate q-agent, magnesium acetate, magnesium silicofluoride and magnesium sulfate, more preferably comprises one or both in Magnesium Silicate q-agent, magnesium acetate, magnesium silicofluoride and magnesium sulfate; The present invention does not have special restriction to the described source containing magnesium material, adopt mentioned kind well known to those skilled in the art containing magnesium material, as Magnesium Silicate q-agent can adopt sepiolite.In the present invention, the described mass content of magnesium material in described cement grinding aid that contain is preferably 2wt%～5wt%, and more preferably 2wt%～4wt%, most preferably is 3wt%～4wt%;
In the present invention, the mass content of layered water glass in described cement grinding aid is preferably 5wt%～10wt%, and more preferably 6wt%～9wt%, most preferably is 7wt%～8wt%; The present invention does not have special restriction to the source of layered water glass, adopts lamina sodium silicate well known to those skilled in the art, as adopted the commercial goods of lamina sodium silicate.
The present invention does not have special restriction to the preparation method of described cement grinding aid, after each component is mixed described in technique scheme, can obtain required cement grinding aid.The present invention does not have special restriction to the method for described mixing, adopts the hybrid technology scheme of composition well known to those skilled in the art.
Cement grinding aid provided by the invention is for cement, can improve the intensity of cement, and there is short solidifying effect, thereby can improve the consumption of industrial residue, reduce the consumption of grog, thereby improve the rate of set of cement, shortened the time of coagulation of cement, and improved the mechanical strength of the cement obtaining.
The invention provides the application in cement of cement grinding aid described in technique scheme, concrete, can be for having mixed the cement of industrial residue.Compared with prior art, in the time of strength of cement and grinding machine platform and output is constant or substantially constant in the situation that, the cement grinding aid that adopts the application to provide, can reduce the grog that uses 8wt%～10wt%, increases the use of the industrial residue of 8wt%～10wt%.In the present invention, the consumption of described cement grinding aid in described cement is 0.3wt%～0.5wt%, is preferably 0.4wt%～0.5wt%, more preferably 0.4wt%～0.45wt%.
The invention provides a kind of cement grinding aid, comprise the organic short solidifying class material of following component: 10wt%～20wt%, described organic short solidifying class material comprises alcamines material, calcium formiate and polyacrylamide; The inorganic short solidifying class material of 12wt%～25wt%, described inorganic short solidifying class material comprises aluminium-containing substance, contains magnesium material and lamina sodium silicate; Surplus is diatomite.Cement grinding aid provided by the invention comprises organic short solidifying class material and inorganic short solidifying class material, in the present invention, described organic short solidifying class material and inorganic short solidifying class matter interaction, make the cement grinding aid obtaining can improve the time of cement setting, and improved the intensity of cement.In addition, cement grinding aid provided by the invention can also improve output, the saving grinding pow consumption of cement, in the situation that ensureing that strength of cement and mill hourly output are substantially constant, can reduce the consumption of grog, improves the consumption of industrial residue.Experimental result shows, the folding strength that cement grinding aid provided by the invention makes to shorten 50～80min, 3d the time of coagulation of cement can improve 12%, the folding strength of 28d can improve 8.6%, the ultimate compression strength of 3d can improve 21.25%, the ultimate compression strength of 28d has improved 14.2%; Can improve cement output more than 15%, save grinding pow consumption more than 15%; Ensure, in strength of cement and the substantially constant situation of mill hourly output, can reduce by 8%～10% grog, multiplex 8%～10% industrial residue.
Cement grinding aid provided by the invention is the short solidifying enhanced cement grinding aid of a class, can either shorten the time of coagulation of cement, can improve again the mechanical strength of cement.
In order to further illustrate the present invention, below in conjunction with embodiment, cement grinding aid provided by the invention is described in detail, but they can not be interpreted as to limiting the scope of the present invention.
Embodiment 1
The diatomite of the lamina sodium silicate of the magnesium acetate of the Tai-Ace S 150 of the polyacrylamide of the calcium formiate of the trolamine of 6 mass parts, 3 mass parts, 3 mass parts, 10 mass parts, 3 mass parts, 5 mass parts and 70 mass parts is mixed, obtain cement grinding aid.
The present invention tests the cement grinding aid obtaining in the little mill of Ф 500mm × 500mm standard test, and detailed process is as follows:
Mix according to following material proportion: the slag of the grog that massfraction is 70%, the gypsum that massfraction is 4.0%, massfraction 12% and the flyash that massfraction is 14%, obtain mixture;
Be the cement grinding aid that the present embodiment of mixture total mass 0.4% obtains to adding massfraction in the mixture obtaining, after combined grinding 30min, obtain cement after treatment.
According to the method test strength of cement mortar of recording in GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) "; Adopt the ventilative ratio surface area instrument of DBT-127 type Bo Shi to detect Blain specific surface; Detect consumptive use of water normal consistence, the time of coagulation of cement according to the method for recording in GB1346-2001 " cement normal consistency water consumption, time of coagulation, the stability method of inspection ", result is as shown in table 1, and table 1 is the little mill experimental result that the embodiment of the present invention and comparative example obtain.
Embodiment 2
The lamina sodium silicate of the magnesium silicofluoride of the calcining bauxitic clay of the sodium metaaluminate of the Tai-Ace S 150 of the polyacrylamide of the calcium formiate of the di-alcohol monoisopropanolamine of 8 mass parts, 6 mass parts, 1 mass parts, 2 mass parts, 2 mass parts, 6 mass parts, 2 mass parts, 10 mass parts and diatomite 63 mass parts are mixed, obtain cement grinding aid.
The present invention tests the cement grinding aid obtaining in the little mill of Ф 500mm × 500mm standard test, and detailed process is as follows:
Mix according to following material proportion: the slag of the grog that massfraction is 70%, the gypsum that massfraction is 4.0%, massfraction 12% and the flyash that massfraction is 14%, obtain mixture;
Be the short solidifying enhanced cement grinding aid that the present embodiment of mixture total mass 0.3% obtains to adding massfraction in the mixture obtaining, after combined grinding 30min, obtain cement after treatment.
According to the method test strength of cement mortar of recording in GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) "; Adopt the ventilative ratio surface area instrument of DBT-127 type Bo Shi to detect Blain specific surface; Detect consumptive use of water normal consistence, the time of coagulation of cement according to the method for recording in GB1346-2001 " cement normal consistency water consumption, time of coagulation, the stability method of inspection ", result is as shown in table 1, and table 1 is the little mill experimental result that the embodiment of the present invention and comparative example obtain.
Embodiment 3
The diatomite of the lamina sodium silicate of the magnesium acetate of the sepiolite of the calcining bauxitic clay of the Tai-Ace S 150 of the polyacrylamide of the calcium formiate of the di-alcohol monoisopropanolamine of the trolamine of 3.5 mass parts, 3 mass parts, 4 mass parts, 2 mass parts, 3 mass parts, 5 mass parts, 1 mass parts, 1.5 mass parts, 8 mass parts and 69 mass parts is mixed, obtain cement grinding aid.
The present invention tests the cement grinding aid obtaining in the little mill of Ф 500mm × 500mm standard test, and detailed process is as follows:
Mix according to following material proportion: the slag of the grog that massfraction is 70%, the gypsum that massfraction is 4.0%, massfraction 12% and the flyash that massfraction is 14%, obtain mixture;
Be the short solidifying enhanced cement grinding aid that the present embodiment of mixture total mass 0.5% obtains to adding massfraction in the mixture obtaining, after combined grinding 30min, obtain cement after treatment.
According to the method test strength of cement mortar of recording in GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) "; Adopt the ventilative ratio surface area instrument of DBT-127 type Bo Shi to detect and obtain Blain specific surface; Detect consumptive use of water normal consistence, the time of coagulation of cement according to the method for recording in GB1346-2001 " cement normal consistency water consumption, time of coagulation, the stability method of inspection ", result is as shown in table 1, and table 1 is the little mill experimental result that the embodiment of the present invention and comparative example obtain.
Comparative example 1
In the little mill of Ф 500mm × 500mm standard test, test, detailed process is as follows:
Mix according to following material proportion: the slag of the grog that massfraction is 70%, the gypsum that massfraction is 4.0%, massfraction 12% and the flyash that massfraction is 14% mix, and obtain cement after treatment after grinding 30min.
According to the method test strength of cement mortar of recording in GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) "; Adopt the ventilative ratio surface area instrument of DBT-127 type Bo Shi to detect specific surface area; Detect consumptive use of water normal consistence, the time of coagulation of cement according to the method for recording in GB1346-2001 " cement normal consistency water consumption, time of coagulation, the stability method of inspection ", result is as shown in table 1, and table 1 is the little mill experimental result that the embodiment of the present invention and comparative example obtain.
The little mill experimental result that table 1 embodiment of the present invention and comparative example obtain
As can be seen from Table 1, cement grinding aid provided by the invention has higher short solidifying and mechanics reinforced effects, has shortened the time of coagulation of cement, has improved the mechanical strength of cement.
As seen from the above embodiment, the invention provides a kind of cement grinding aid, comprise the organic short solidifying class material of following component: 10wt%～20wt%, described organic short solidifying class material comprises alcamines material, calcium formiate and polyacrylamide; The inorganic short solidifying class material of 12wt%～25wt%, described inorganic short solidifying class material comprises aluminium-containing substance, contains magnesium material and lamina sodium silicate; Surplus is diatomite.Cement grinding aid provided by the invention comprises organic short solidifying class material and inorganic short solidifying class material, in the present invention, described organic short solidifying class material and inorganic short solidifying class matter interaction, make the cement grinding aid obtaining can improve the time of cement setting, and improved the intensity of cement.In addition, cement grinding aid provided by the invention can also improve output, the saving grinding pow consumption of cement, in the situation that ensureing that strength of cement and mill hourly output are substantially constant, can reduce the consumption of grog, improves the consumption of industrial residue.Experimental result shows, the folding strength that cement grinding aid provided by the invention makes to shorten 50～80min, 3d the time of coagulation of cement can improve 12%, the folding strength of 28d can improve 8.6%, the ultimate compression strength of 3d can improve 21.25%, the ultimate compression strength of 28d has improved 14.2%; Can improve cement output more than 15%, save grinding pow consumption more than 15%; Ensure, in strength of cement and the substantially constant situation of mill hourly output, can reduce by 8%～10% grog, multiplex 8%～10% industrial residue.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a short solidifying enhanced cement grinding aid, comprises following component:
The organic short solidifying class material of 10wt%～20wt%, described organic short solidifying class material comprises alcamines material, calcium formiate and polyacrylamide;
The inorganic short solidifying class material of 12wt%～25wt%, described inorganic short solidifying class material comprises aluminium-containing substance, contains magnesium material and lamina sodium silicate;
Surplus is diatomite.
2. cement grinding aid according to claim 1, is characterized in that, described alcamines material comprises trolamine and/or di-alcohol monoisopropanolamine.
3. cement grinding aid according to claim 1, is characterized in that, described aluminium-containing substance comprises one or more in Tai-Ace S 150, sodium metaaluminate and aluminum oxide;
The described magnesium material that contains comprises one or more in Magnesium Silicate q-agent, magnesium acetate, magnesium silicofluoride and magnesium sulfate.
4. cement grinding aid according to claim 1 and 2, is characterized in that, the mass content of described alcamines material in described cement grinding aid is 6wt%～10wt%.
5. cement grinding aid according to claim 1, is characterized in that, the mass content of described calcium formiate in described cement grinding aid is 3wt%～6wt%.
6. cement grinding aid according to claim 1, is characterized in that, the mass content of described polyacrylamide in described cement grinding aid is 1wt%～3wt%.
7. according to the cement grinding aid described in claim 1 or 3, it is characterized in that, the mass content of described aluminium-containing substance in described cement grinding aid is 5wt%～10wt%.
8. according to the cement grinding aid described in claim 1 or 3, it is characterized in that, described is 2wt%～5wt% containing the mass content of magnesium material in described cement grinding aid.
9. cement grinding aid according to claim 1, is characterized in that, the mass content of layered water glass in described cement grinding aid is 5wt%～10wt%.
10. the application of cement grinding aid in cement described in claim 1～9 any one, the consumption of described cement grinding aid in described cement is 0.3wt%～0.5wt%.
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| CN104449568A (en) * | 2014-11-18 | 2015-03-25 | 桂林华越环保科技有限公司 | High-yield energy-saving type slag grinding aid |
| CN104692706A (en) * | 2015-03-12 | 2015-06-10 | 山东宏艺科技股份有限公司 | Grinding additive for powder-grinding steel slag in vertical mill |
| CN105130216A (en) * | 2015-08-19 | 2015-12-09 | 安徽建筑大学 | Preparation method for phosphorus-slag micropowder applied to cement-based material |
| CN105347722A (en) * | 2015-10-28 | 2016-02-24 | 山东众森科技股份有限公司 | Multi-blending inert mixed cement grinding aid and preparation method thereof |
| CN105753359A (en) * | 2016-02-26 | 2016-07-13 | 中钢集团马鞍山矿山研究院有限公司 | Grinding aid for preparing cementing material for filling and dry stacking of mines |
| CN105948555A (en) * | 2016-06-27 | 2016-09-21 | 湖北鑫统领万象科技有限公司 | Special grinding aid for phosphorus slag cement |
| CN106365496A (en) * | 2016-08-22 | 2017-02-01 | 桂林新艺制冷设备有限责任公司 | Novel cement grinding aid and cement thereof |
| CN107986669A (en) * | 2017-12-07 | 2018-05-04 | 中铁岩锋成都科技有限公司 | Alkali-free liquid setting accelerator and preparation method thereof |
| CN108164176A (en) * | 2017-12-01 | 2018-06-15 | 蒋春霞 | A kind of preparation method of concrete accelerant |
| CN108295999A (en) * | 2018-01-22 | 2018-07-20 | 张藜泷 | A kind of Khotan jade superfine powder and preparation method thereof |
| JP2020183338A (en) * | 2019-05-09 | 2020-11-12 | 宇部興産株式会社 | Admixture for mortar concrete, cement composition, mortar composition and concrete composition containing the same, and method for producing mortar cured product and concrete cured product |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104449568A (en) * | 2014-11-18 | 2015-03-25 | 桂林华越环保科技有限公司 | High-yield energy-saving type slag grinding aid |
| CN104692706A (en) * | 2015-03-12 | 2015-06-10 | 山东宏艺科技股份有限公司 | Grinding additive for powder-grinding steel slag in vertical mill |
| CN105130216A (en) * | 2015-08-19 | 2015-12-09 | 安徽建筑大学 | Preparation method for phosphorus-slag micropowder applied to cement-based material |
| CN105347722A (en) * | 2015-10-28 | 2016-02-24 | 山东众森科技股份有限公司 | Multi-blending inert mixed cement grinding aid and preparation method thereof |
| CN105753359B (en) * | 2016-02-26 | 2017-09-26 | 中钢集团马鞍山矿山研究院有限公司 | For prepare filling in mine, dry heap binder materials grinding aid |
| CN105753359A (en) * | 2016-02-26 | 2016-07-13 | 中钢集团马鞍山矿山研究院有限公司 | Grinding aid for preparing cementing material for filling and dry stacking of mines |
| CN105948555A (en) * | 2016-06-27 | 2016-09-21 | 湖北鑫统领万象科技有限公司 | Special grinding aid for phosphorus slag cement |
| CN106365496A (en) * | 2016-08-22 | 2017-02-01 | 桂林新艺制冷设备有限责任公司 | Novel cement grinding aid and cement thereof |
| CN108164176A (en) * | 2017-12-01 | 2018-06-15 | 蒋春霞 | A kind of preparation method of concrete accelerant |
| CN107986669A (en) * | 2017-12-07 | 2018-05-04 | 中铁岩锋成都科技有限公司 | Alkali-free liquid setting accelerator and preparation method thereof |
| CN108295999A (en) * | 2018-01-22 | 2018-07-20 | 张藜泷 | A kind of Khotan jade superfine powder and preparation method thereof |
| CN108295999B (en) * | 2018-01-22 | 2019-11-19 | 张藜泷 | A kind of Khotan jade superfine powder and preparation method thereof |
| JP2020183338A (en) * | 2019-05-09 | 2020-11-12 | 宇部興産株式会社 | Admixture for mortar concrete, cement composition, mortar composition and concrete composition containing the same, and method for producing mortar cured product and concrete cured product |
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