JP6831126B2 - Asphalt composition for waterproofing work and asphalt construction method - Google Patents
Asphalt composition for waterproofing work and asphalt construction method Download PDFInfo
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- 239000010426 asphalt Substances 0.000 title claims description 272
- 238000004078 waterproofing Methods 0.000 title claims description 137
- 239000000203 mixture Substances 0.000 title claims description 26
- 238000010276 construction Methods 0.000 title claims description 23
- 150000001875 compounds Chemical class 0.000 claims description 46
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 39
- 239000003208 petroleum Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 23
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 20
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 19
- 239000003607 modifier Substances 0.000 claims description 16
- 230000001877 deodorizing effect Effects 0.000 claims description 8
- 239000002781 deodorant agent Substances 0.000 description 39
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 21
- 238000007792 addition Methods 0.000 description 20
- 238000010438 heat treatment Methods 0.000 description 17
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 17
- 238000002844 melting Methods 0.000 description 16
- 230000008018 melting Effects 0.000 description 16
- 239000000779 smoke Substances 0.000 description 15
- 238000005187 foaming Methods 0.000 description 13
- 238000003780 insertion Methods 0.000 description 13
- 230000037431 insertion Effects 0.000 description 13
- 229910000029 sodium carbonate Inorganic materials 0.000 description 11
- 238000003756 stirring Methods 0.000 description 11
- 239000001993 wax Substances 0.000 description 10
- 238000001704 evaporation Methods 0.000 description 9
- 230000008020 evaporation Effects 0.000 description 9
- -1 polypropylene Polymers 0.000 description 9
- 239000011736 potassium bicarbonate Substances 0.000 description 9
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 9
- 229910000027 potassium carbonate Inorganic materials 0.000 description 9
- 229940086066 potassium hydrogencarbonate Drugs 0.000 description 9
- 238000002156 mixing Methods 0.000 description 8
- 230000035515 penetration Effects 0.000 description 8
- 235000015497 potassium bicarbonate Nutrition 0.000 description 8
- 235000011181 potassium carbonates Nutrition 0.000 description 8
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 8
- 230000035945 sensitivity Effects 0.000 description 8
- 238000010998 test method Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 239000004743 Polypropylene Substances 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 229920001155 polypropylene Polymers 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 235000017550 sodium carbonate Nutrition 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 230000009965 odorless effect Effects 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 150000003464 sulfur compounds Chemical class 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000005292 vacuum distillation Methods 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012968 metallocene catalyst Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229960003975 potassium Drugs 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 125000003011 styrenyl group Chemical class [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Road Paving Structures (AREA)
- Bridges Or Land Bridges (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明は、防水工事用アスファルト組成物及びアスファルトの施工方法に関する。 The present invention relates to an asphalt composition for waterproofing work and a method for constructing asphalt.
従来からアスファルトは、安価で透水性がほとんどないため、建築物の防水工事に際して防水材や接着剤として広く利用されている。アスファルトについては日本工業規格（ＪＩＳ Ｋ２２０７石油アスファルト）に示されている。アスファルトの種類としては、ストレートアスファルト、ブローンアスファルト及び防水工事用アスファルトの３種類がある。 Conventionally, asphalt is inexpensive and has almost no water permeability, so it is widely used as a waterproof material or an adhesive in waterproofing work of buildings. Asphalt is shown in Japanese Industrial Standards (JIS K2207 Petroleum Asphalt). There are three types of asphalt: straight asphalt, blown asphalt, and asphalt for waterproofing work.
ストレートアスファルトは、軟化点が低く、作業時（特に夏場の施工時）のべたつき、低温脆性等の問題を抱えている。このため、高温のストレートアスファルトに空気を吹き込んで酸化重合させて、低温、高温領域での性能を改善したブローンアスファルトが防水工事に使われている。
一般に、石油の減圧蒸留残査油に減圧留出油等をカットバック材として使用し、適度な針入度又は粘度に調製したものを原料油とし、無触媒あるいは触媒下において、所定の反応条件でブローイングすることにより製造されているアスファルトが、防水工事用アスファルトである。防水工事用アスファルトは、ＪＩＳＫ２２０７石油アスファルトに記載の防水工事用アスファルトの品質に適合することが求められている。
防水工事用アスファルトは、ＪＩＳＫ２２０７で用途によって１〜４種に分類されているが、現在は３種のみが流通し、一般地域のみならず寒冷地域でも用いられている。
Straight asphalt has a low softening point, and has problems such as stickiness during work (especially during construction in summer) and low temperature brittleness. For this reason, blown asphalt, which has improved performance in low and high temperature regions by blowing air into high temperature straight asphalt and oxidatively polymerizing it, is used for waterproofing work.
In general, vacuum distillation oil or the like is used as a cutback material for the vacuum distillation residual oil of petroleum, and the oil prepared to have an appropriate needle insertion degree or viscosity is used as a raw material oil under predetermined reaction conditions without a catalyst or under a catalyst. The asphalt produced by blowing in is the asphalt for waterproofing work. The waterproofing asphalt is required to conform to the quality of the waterproofing asphalt described in JIS K2207 Petroleum Asphalt.
Asphalt for waterproofing work is classified into 1 to 4 types according to the application in JIS K2207, but currently only 3 types are distributed and used not only in general areas but also in cold areas.
施工時には、防水工事用アスファルトを施工に適した温度（２５０〜２８０℃）まで加熱溶融して使用する。このため、アスファルト中に含まれる軽質成分の蒸発による発煙、発臭が生じる。発煙、発臭は、温度が高くなるほど多くなる。 At the time of construction, asphalt for waterproof construction is heated and melted to a temperature suitable for construction (250 to 280 ° C.) before use. For this reason, smoke and odor are generated due to evaporation of light components contained in asphalt. Smoke and odor increase as the temperature rises.
こうした問題に対し、例えば、特許文献１には、ストレートアスファルトに改質剤を添加し、施工温度を下げるアスファルト防水工法が提案されている。
特許文献２には、アスファルト溶解釜に脱臭装置を組み合わせた脱臭装置つき防水施工用アスファルト溶解釜が提案されている。
特許文献３には、アスファルト溶解釜から発生する煙、臭いを吸引して排気し、加熱バーナーで燃焼させる防水工事用アスファルト溶解釜が提案されている。
To solve such a problem, for example, Patent Document 1 proposes an asphalt waterproofing method in which a modifier is added to straight asphalt to lower the construction temperature.
Patent Document 2 proposes an asphalt melting pot for waterproof construction with a deodorizing device, which is a combination of an asphalt melting pot and a deodorizing device.
Patent Document 3 proposes an asphalt melting pot for waterproofing work in which smoke and odor generated from the asphalt melting pot are sucked and exhausted and burned by a heating burner.
しかしながら、特許文献１の技術では、発煙、発臭を低減できるものの、満足のいくものではなかった。特許文献２〜３の技術では、溶解したアスファルトを専用の容器に移し、これを柄杓で撒きながらルーフィング類を張付ける際に煙、臭いが外気に放出されるため、根本的な解決には至っていない。 However, although the technique of Patent Document 1 can reduce smoke and odor, it is not satisfactory. In the techniques of Patent Documents 2 and 3, smoke and odor are released to the outside air when the melted asphalt is transferred to a special container and roofings are attached while sprinkling it with a cassotte, resulting in a fundamental solution. Not in.
本発明は、上記事情に鑑みてなされたものであり、発煙、発臭をより低減できる防水工事用アスファルト組成物及びアスファルトの施工方法を目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is an asphalt composition for waterproof construction and a method for constructing asphalt, which can further reduce smoke and odor.
鋭意検討を重ねた結果、本発明者等は、以下の構成を備える防水工事用アスファルト組成物が、上記課題を解決できることを見出した。
すなわち、本発明の防水工事用アスファルト組成物は、以下の構成を有する。
［１］防水工事用アスファルト１００質量部に対して、炭酸ナトリウム、炭酸水素ナトリウム、炭酸カリウム及び炭酸水素カリウムから選ばれる１種以上の消臭化合物０．５〜５．０質量部を含有する、防水工事用アスファルト組成物。
［２］前記防水工事用アスファルトが、ＪＩＳ Ｋ２２０７石油アスファルトに記載の防水工事用アスファルト３種である、［１］に記載の防水工事用アスファルト組成物。
［３］前記防水工事用アスファルトが、ストレートアスファルトと改質剤との混合物を含有し、ＪＩＳ Ｋ２２０７石油アスファルトに記載の防水工事用アスファルト３種の品質に適合する、［１］又は［２］に記載の防水工事用アスファルト組成物。
As a result of repeated diligent studies, the present inventors have found that an asphalt composition for waterproofing work having the following configuration can solve the above problems.
That is, the asphalt composition for waterproofing work of the present invention has the following constitution.
[1] 0.5 to 5.0 parts by mass of one or more deodorant compounds selected from sodium carbonate, sodium hydrogen carbonate, potassium carbonate and potassium hydrogen carbonate are contained in 100 parts by mass of asphalt for waterproofing work. Asphalt composition for waterproofing work.
[2] The asphalt composition for waterproofing work according to [1], wherein the asphalt for waterproofing work is three types of asphalt for waterproofing work described in JIS K2207 Petroleum Asphalt.
[3] The waterproofing asphalt contains a mixture of straight asphalt and a modifier, and conforms to the qualities of the three types of waterproofing asphalt described in JIS K2207 Petroleum Asphalt, according to [1] or [2]. The asphalt composition for waterproofing work described.
さらに、本発明のアスファルトの施工方法は、以下の構成を有する。
［４］防水工事用アスファルトを１５０〜２８０℃に加熱溶融し、前記防水工事用アスファルト１００質量部に対して、炭酸ナトリウム、炭酸水素ナトリウム、炭酸カリウム及び炭酸水素カリウムから選ばれる１種以上の消臭化合物０．５〜５．０質量部を混合して消臭処理済アスファルトを得、前記消臭処理済アスファルトを防水工事に用いる、アスファルトの施工方法。
［５］前記防水工事用アスファルトが、ＪＩＳ Ｋ２２０７石油アスファルトに記載の防水工事用アスファルト３種である、［４］に記載のアスファルトの施工方法。
［６］前記防水工事用アスファルトが、ストレートアスファルトと改質剤との混合物を含有し、ＪＩＳ Ｋ２２０７石油アスファルトに記載の防水工事用アスファルト３種の品質に適合する、［４］又は［５］に記載のアスファルトの施工方法。
Further, the asphalt construction method of the present invention has the following configurations.
[4] The asphalt for waterproofing work is heated and melted at 150 to 280 ° C., and one or more kinds selected from sodium carbonate, sodium hydrogencarbonate, potassium carbonate and potassium hydrogencarbonate are consumed with respect to 100 parts by mass of the asphalt for waterproofing work. A method for constructing asphalt, in which 0.5 to 5.0 parts by mass of an odor compound is mixed to obtain deodorized asphalt, and the deodorized asphalt is used for waterproofing work.
[5] The method for constructing asphalt according to [4], wherein the asphalt for waterproofing work is three types of asphalt for waterproofing work described in JIS K2207 Petroleum Asphalt.
[6] The waterproofing asphalt contains a mixture of straight asphalt and a modifier, and conforms to the qualities of the three types of waterproofing asphalt described in JIS K2207 Petroleum Asphalt, according to [4] or [5]. The described asphalt construction method.
本発明の防水工事用アスファルト組成物によれば、発煙、発臭をより低減できる。 According to the asphalt composition for waterproofing work of the present invention, smoke generation and odor can be further reduced.
≪防水工事用アスファルト組成物≫
本発明の防水工事用アスファルト組成物は、防水工事用アスファルトと、炭酸ナトリウム、炭酸水素ナトリウム、炭酸カリウム及び炭酸水素カリウムから選ばれる１種以上の消臭化合物とを有する。
以下、本発明の防水工事用アスファルト組成物について、実施形態を挙げて説明する。
≪Asphalt composition for waterproofing work≫
The asphalt composition for waterproofing work of the present invention has asphalt for waterproofing work and one or more deodorant compounds selected from sodium carbonate, sodium hydrogencarbonate, potassium carbonate and potassium hydrogencarbonate.
Hereinafter, the asphalt composition for waterproofing work of the present invention will be described with reference to embodiments.
＜防水工事用アスファルト＞
本実施形態の防水工事用アスファルトは、ＪＩＳ Ｋ２２０７石油アスファルトに記載の防水工事用アスファルトである。すなわち、防水工事用アスファルトは、防水層として必要な性能に改善したアスファルトをいう。
防水工事用アスファルトは、主に鉄筋コンクリート構造物、鉄骨構造物及びその他これに準じる構造物の防水工事に用いられる。
<Asphalt for waterproofing work>
The asphalt for waterproofing work of this embodiment is the asphalt for waterproofing work described in JIS K2207 Petroleum Asphalt. That is, waterproofing asphalt refers to asphalt that has been improved to the performance required as a waterproof layer.
Asphalt for waterproofing work is mainly used for waterproofing work of reinforced concrete structures, steel frame structures and other similar structures.
防水工事用アスファルトは、ＪＩＳ Ｋ２２０７石油アスファルトに記載の「表４防水工事用アスファルトの品質」を満たすことが好ましい。上記「表４防水工事用アスファルトの品質」には、軟化点、２５℃での針入度、針入度指数、蒸発質量変化率、引火点、トルエン可溶分、フラース脆化点、だれ長さ、及び加熱安定性の９種類の物性値が規定されている。 The asphalt for waterproofing work preferably satisfies "Table 4 Quality of Asphalt for Waterproofing Work" described in JIS K2207 Petroleum Asphalt. The above "Quality of asphalt for waterproofing work" includes softening point, needle insertion degree at 25 ° C, needle insertion degree index, evaporation mass change rate, flash point, toluene soluble content, froth embrittlement point, and drool length. Nine kinds of physical property values of embrittlement and heating stability are specified.
軟化点（℃）とは、アスファルトが軟化するときの温度であり、ＪＩＳ Ｋ２２０７石油アスファルトに記載の６．４軟化点試験方法（環球法）による。
防水工事用アスファルトの軟化点は、８５℃以上が好ましく、９０℃以上がより好ましく、９５℃以上がさらに好ましく、１００℃以上が特に好ましい。防水工事用アスファルトの軟化点が上記下限値以上であると、防水工事用アスファルトは耐熱性、特にだれ性状に優れる。防水工事用アスファルトの軟化点の上限値は特に限定されないが、例えば、１１０℃が好ましい。
The softening point (° C.) is the temperature at which the asphalt softens, and is based on the 6.4 softening point test method (ring ball method) described in JIS K2207 Petroleum Asphalt.
The softening point of the asphalt for waterproofing work is preferably 85 ° C. or higher, more preferably 90 ° C. or higher, further preferably 95 ° C. or higher, and particularly preferably 100 ° C. or higher. When the softening point of the asphalt for waterproofing work is equal to or higher than the above lower limit value, the asphalt for waterproofing work is excellent in heat resistance, particularly dripping property. The upper limit of the softening point of the asphalt for waterproofing work is not particularly limited, but for example, 110 ° C. is preferable.
針入度とは、アスファルトの硬さを表す尺度であり、ＪＩＳ Ｋ２２０７石油アスファルトに記載の６．３針入度試験方法による規定の針が、試料中に垂直に進入した長さの０．１ｍｍを１として表した数値である。針入度が小さいほど、硬いアスファルトであることを意味する。なお、針入度は２５℃で測定する。
防水工事用アスファルトの針入度は、２０以上５０以下が好ましく、２５以上４５以下がより好ましく、３０以上４０以下がさらに好ましい。防水工事用アスファルトの針入度が上記数値範囲内であると、防水工事用アスファルトは、施工に適した硬さを有する。
Needle penetration is a measure of the hardness of asphalt, and is 0.1 mm of the length at which the specified needle according to the 6.3 needle penetration test method described in JIS K2207 Petroleum Asphalt penetrates vertically into the sample. Is a numerical value expressed as 1. The smaller the degree of needle insertion, the harder the asphalt. The degree of needle insertion is measured at 25 ° C.
The degree of needle insertion of the asphalt for waterproofing work is preferably 20 or more and 50 or less, more preferably 25 or more and 45 or less, and further preferably 30 or more and 40 or less. When the degree of needle insertion of the asphalt for waterproofing work is within the above numerical range, the asphalt for waterproofing work has a hardness suitable for construction.
針入度指数とは、アスファルトの感温性を表す指数であり、試料の針入度と軟化点との関係から求められる。針入度指数は、ＪＩＳ Ｋ２２０７石油アスファルトに記載の６．１１針入度指数算出方法により求められる。
防水工事用アスファルトの針入度指数は、３．５以上が好ましく、４．０以上がより好ましく、５．０以上がさらに好ましく、６．０以上が特に好ましい。防水工事用アスファルトの針入度指数が上記下限値以上であると、防水工事用アスファルトは感温性が小さく、温度の高低によってアスファルトの硬さ、粘度等が変化しにくい。防水工事用アスファルトの針入度指数の上限値は特に限定されない。
The needle entry index is an index showing the temperature sensitivity of asphalt, and is obtained from the relationship between the needle penetration of the sample and the softening point. The needle penetration index is obtained by the 6.11 needle penetration index calculation method described in JIS K2207 Petroleum Asphalt.
The needle penetration index of asphalt for waterproofing work is preferably 3.5 or more, more preferably 4.0 or more, further preferably 5.0 or more, and particularly preferably 6.0 or more. When the needle penetration index of the asphalt for waterproofing work is equal to or higher than the above lower limit value, the asphalt for waterproofing work has low temperature sensitivity, and the hardness, viscosity, etc. of the asphalt are unlikely to change depending on the temperature. The upper limit of the needle penetration index of asphalt for waterproofing work is not particularly limited.
蒸発質量変化率とは、アスファルトの加熱貯蔵における安定性を評価する尺度であり、ＪＩＳ Ｋ２２０７石油アスファルトに記載の６．９蒸発試験方法による。蒸発質量変化率は、試料を６．９蒸発試験方法に記載の試験条件で加熱し、加熱前後の試料の質量変化を百分率で表すことにより求められる。
防水工事用アスファルトの蒸発質量変化率は、１質量％以下が好ましい。防水工事用アスファルトの蒸発質量変化率が上記上限値以下であると、防水工事用アスファルトは加熱貯蔵における安定性に優れる。防水工事用アスファルトの蒸発質量変化率の下限値は特に限定されない。
The rate of change in evaporation mass is a measure for evaluating the stability of asphalt in heat storage, and is based on the 6.9 evaporation test method described in JIS K2207 Petroleum Asphalt. The rate of change in evaporation mass is determined by heating the sample under the test conditions described in the 6.9 evaporation test method and expressing the change in mass of the sample before and after heating as a percentage.
The rate of change in evaporation mass of asphalt for waterproofing work is preferably 1% by mass or less. When the rate of change in evaporation mass of the asphalt for waterproofing work is not more than the above upper limit value, the asphalt for waterproofing work is excellent in stability in heat storage. The lower limit of the rate of change in evaporation mass of asphalt for waterproofing work is not particularly limited.
引火点（℃）とは、アスファルトが引火するときの温度であり、ＪＩＳ Ｋ２２０７石油アスファルトに記載の６．７引火点試験方法（ＪＩＳ Ｋ２２６５に規定するクリーブランド開放式）による。
防水工事用アスファルトの引火点は、２５０℃以上が好ましく、２７０℃以上がより好ましく、２８０℃以上がさらに好ましい。防水工事用アスファルトの引火点が上記下限値以上であると、防水工事用アスファルトは引火しにくく、安全性に優れる。防水工事用アスファルトの引火点の上限値は特に限定されないが、例えば、３００℃が好ましい。
The flash point (° C.) is the temperature at which the asphalt ignites, and is based on the 6.7 flash point test method (Cleveland open type specified in JIS K2265) described in JIS K2207 petroleum asphalt.
The flash point of the asphalt for waterproofing work is preferably 250 ° C. or higher, more preferably 270 ° C. or higher, and even more preferably 280 ° C. or higher. When the flash point of the asphalt for waterproofing work is equal to or higher than the above lower limit, the asphalt for waterproofing work is less likely to catch fire and is excellent in safety. The upper limit of the flash point of the asphalt for waterproofing work is not particularly limited, but is preferably 300 ° C., for example.
トルエン可溶分とは、アスファルトの純度を表す尺度であり、ＪＩＳ Ｋ２２０７石油アスファルトに記載の６．６トルエン可溶分試験方法による。トルエン可溶分は、試料をトルエンに溶かし、フィルタで濾過して不溶分を取り除いたものであり、百分率で表される。
防水工事用アスファルトのトルエン可溶分は、９２以上が好ましく、９５以上がより好ましく、９８以上がさらに好ましい。防水工事用アスファルトのトルエン可溶分が上記下限値以上であると、防水工事用アスファルトは高純度である。防水工事用アスファルトのトルエン可溶分の上限値は特に限定されない。
The toluene-soluble component is a measure of the purity of asphalt, and is based on the 6.6 toluene-soluble component test method described in JIS K2207 Petroleum Asphalt. The toluene-soluble component is obtained by dissolving the sample in toluene and filtering it with a filter to remove the insoluble component, and is expressed as a percentage.
The toluene-soluble content of the asphalt for waterproofing work is preferably 92 or more, more preferably 95 or more, and even more preferably 98 or more. When the toluene-soluble content of the waterproofing asphalt is equal to or higher than the above lower limit, the waterproofing asphalt has high purity. The upper limit of the toluene-soluble content of asphalt for waterproofing work is not particularly limited.
フラース脆化点（℃）とは、アスファルトの低温（例えば、０℃以下）における可撓性を表す尺度であり、ＪＩＳ Ｋ２２０７石油アスファルトに記載の６．１５フラース脆化点試験方法による。フラース脆化点は、鋼板上のアスファルトの薄膜が規定の条件で冷やされ、かつ、曲げられたとき、アスファルトの薄膜が脆化して亀裂を生じる最初の温度で表される。
防水工事用アスファルトのフラース脆化点は、−５℃以下が好ましく、−１０℃以下がより好ましく、−１５℃以下がさらに好ましく、−２０℃以下が特に好ましい。防水工事用アスファルトのフラース脆化点が上記上限値以下であると、防水工事用アスファルトは可撓性に優れる。防水工事用アスファルトのフラース脆化点の下限値は特に限定されない。
The frass embrittlement point (° C.) is a measure of the flexibility of asphalt at a low temperature (for example, 0 ° C. or lower), and is based on the 6.15 frass embrittlement point test method described in JIS K2207 Petroleum Asphalt. The frass embrittlement point is represented by the initial temperature at which the asphalt thin film embrittles and cracks when the asphalt thin film on the steel sheet is cooled and bent under specified conditions.
The froth embrittlement point of the asphalt for waterproofing work is preferably −5 ° C. or lower, more preferably −10 ° C. or lower, further preferably −15 ° C. or lower, and particularly preferably −20 ° C. or lower. When the froth embrittlement point of the asphalt for waterproofing work is not more than the above upper limit value, the asphalt for waterproofing work is excellent in flexibility. The lower limit of the froth embrittlement point of asphalt for waterproofing work is not particularly limited.
だれ長さ（ｍｍ）とは、アスファルトの高温流動抵抗性を表す尺度であり、ＪＩＳ Ｋ２２０７石油アスファルトに記載の６．１６だれ長さ試験方法による。だれ長さは、規定の形状の型枠に流し込んだ試料を試験条件の下で垂直に懸垂したときに試料がだれる長さを表す。
防水工事用アスファルトのだれ長さは、８ｍｍ以下が好ましい。防水工事用アスファルトのだれ長さが上記上限値以下であると、防水工事用アスファルトは高温流動抵抗性に優れる。防水工事用アスファルトのだれ長さの下限値は特に限定されないが、例えば、０ｍｍが好ましい。
The drool length (mm) is a measure of the high temperature flow resistance of asphalt, and is based on the 6.16 drool length test method described in JIS K2207 Petroleum Asphalt. The drool length represents the length at which the sample drips when the sample poured into a mold having a specified shape is suspended vertically under test conditions.
The drool length of the asphalt for waterproofing work is preferably 8 mm or less. When the drool length of the asphalt for waterproofing work is not more than the above upper limit value, the asphalt for waterproofing work has excellent high temperature flow resistance. The lower limit of the drool length of the asphalt for waterproofing work is not particularly limited, but is preferably 0 mm, for example.
加熱安定性とは、アスファルトの加熱溶融時における熱安定性を表す尺度であり、ＪＩＳ Ｋ２２０７石油アスファルトに記載の６．１７加熱安定性試験方法による。加熱安定性は、試料を規定の条件で加熱し、その加熱前後のフラース脆化点の差（℃）で表される。
防水工事用アスファルトの加熱安定性は、５℃以下が好ましい。防水工事用アスファルトの加熱安定性が上記上限値以下であると、防水工事用アスファルトは加熱溶融時における熱安定性に優れる。防水工事用アスファルトの加熱安定性の下限値は特に限定されない。
The heating stability is a measure of the thermal stability of asphalt during heating and melting, and is based on the 6.17 thermal stability test method described in JIS K2207 Petroleum Asphalt. The heating stability is expressed by the difference (° C.) in the frass embrittlement point before and after heating the sample under specified conditions.
The heating stability of asphalt for waterproofing work is preferably 5 ° C. or lower. When the heating stability of the asphalt for waterproofing work is not more than the above upper limit value, the asphalt for waterproofing work is excellent in thermal stability at the time of heating and melting. The lower limit of the heating stability of asphalt for waterproofing work is not particularly limited.
防水工事用アスファルトは、ＪＩＳ Ｋ２２０７石油アスファルトに記載の防水工事用アスファルト３種であることが好ましい。
防水工事用アスファルトは、現在は３種のみが流通し、一般地域のみならず寒冷地域でも用いられている。
The asphalt for waterproofing work is preferably three types of asphalt for waterproofing work described in JIS K2207 Petroleum Asphalt.
Currently, only three types of asphalt for waterproofing work are distributed, and they are used not only in general areas but also in cold areas.
防水工事用アスファルトは、ストレートアスファルトと改質剤との混合物を含有することが好ましい。防水工事用アスファルトがストレートアスファルトを含有することで、より汎用性の高いアスファルトを原料として利用できる。
ストレートアスファルトとしては、ＪＩＳ Ｋ２２０７石油アスファルトに記載のストレートアスファルトが挙げられる。ストレートアスファルトの種類としては、６０〜８０（２５℃における針入度が６０を超え８０以下）、８０〜１００（２５℃における針入度が８０を超え１００以下）、１００〜１２０（２５℃における針入度が１００を超え１２０以下）、１２０〜１５０（２５℃における針入度が１２０を超え１５０以下）、１５０〜２００（２５℃における針入度が１５０を超え２００以下）が挙げられ、入手のしやすさから、６０〜８０、８０〜１００が好ましい。
The asphalt for waterproofing work preferably contains a mixture of straight asphalt and a modifier. Since the asphalt for waterproofing works contains straight asphalt, more versatile asphalt can be used as a raw material.
Examples of the straight asphalt include the straight asphalt described in JIS K2207 Petroleum Asphalt. Types of straight asphalt include 60 to 80 (needle insertion degree at 25 ° C. exceeds 60 and 80 or less), 80 to 100 (needle insertion degree at 25 ° C. exceeds 80 and 100 or less), and 100 to 120 (needle insertion degree at 25 ° C.). Needle insertion degree exceeds 100 and 120 or less), 120 to 150 (needle insertion degree at 25 ° C. exceeds 120 and 150 or less), 150 to 200 (needle insertion degree at 25 ° C. exceeds 150 and 200 or less). From the viewpoint of easy availability, 60 to 80 and 80 to 100 are preferable.
ストレートアスファルトと改質剤との混合物は、ＪＩＳ Ｋ２２０７石油アスファルトに記載の防水工事用アスファルト３種の品質に適合することが好ましい。ストレートアスファルトと改質剤との混合物を防水工事用アスファルト３種として出荷できるためである。 The mixture of straight asphalt and modifier preferably conforms to the quality of the three types of waterproof asphalt described in JIS K2207 Petroleum Asphalt. This is because a mixture of straight asphalt and a modifier can be shipped as three types of asphalt for waterproofing work.
改質剤は、ストレートアスファルトと混合することで、アスファルトの溶融温度を下げ、防水材として長期間使用できる程度までアスファルトの軟化点を上昇できる添加剤である。
改質剤としては、ワックス、軟質ポリプロピレン、水添スチレン系熱可塑性エラストマー（ＳＥＢＳ）等が挙げられる。
ワックスとしては、合成ワックス、天然ワックスが挙げられる。合成ワックスとしては、合成パラフィンワックス、重合型ポリエチレンワックス、変性型ポリエチレンワックス、熱分解型ポリエチレンワックス、熱分解型ポリプロピレンワックス等が挙げられる。合成パラフィンワックスとしては、フィッシャー・トロプシュワックスが挙げられる。
The modifier is an additive that can lower the melting temperature of asphalt and raise the softening point of asphalt to the extent that it can be used as a waterproof material for a long period of time by mixing with straight asphalt.
Examples of the modifier include wax, soft polypropylene, hydrogenated styrene-based thermoplastic elastomer (SEBS) and the like.
Examples of the wax include synthetic wax and natural wax. Examples of the synthetic wax include synthetic paraffin wax, polymerized polyethylene wax, modified polyethylene wax, pyrolytic polyethylene wax, and pyrolytic polypropylene wax. Examples of the synthetic paraffin wax include Fischer-Tropsch wax.
軟質ポリプロピレンとしては、メルトマスフローレート（ＭＦＲ）が１５〜２５ｇ／１０ｍｉｎ、ビカット軟化温度（５００ｇ荷重）が１００〜１２５℃の軟質ポリプロピレンが挙げられる。軟質ポリプロピレンは、例えば、メタロセン触媒を用いて得られる。 Examples of the soft polypropylene include soft polypropylene having a melt mass flow rate (MFR) of 15 to 25 g / 10 min and a Vicat softening temperature (500 g load) of 100 to 125 ° C. Soft polypropylene is obtained, for example, using a metallocene catalyst.
ＳＥＢＳは、低温性能を改善する改質剤である。ＳＥＢＳの添加量を増やすと、アスファルトの粘着性が向上する。ＳＥＢＳと軟質ポリプロピレンとを併用すると、アスファルトの表面のべたつきを低減できるため、好ましい。
改質剤は、１種を単独で用いてもよく、２種以上を併用してもよい。
SEBS is a modifier that improves low temperature performance. Increasing the amount of SEBS added improves the stickiness of the asphalt. The combined use of SEBS and soft polypropylene is preferable because it can reduce the stickiness of the asphalt surface.
As the modifier, one type may be used alone, or two or more types may be used in combination.
改質剤の含有量は、ストレートアスファルト１００質量部に対して、例えば、１０．６〜１７．６質量部が好ましい。改質剤の含有量が上記下限値以上であると、アスファルトの低温性能を向上しやすく、フラース脆化点をより低くしやすい。改質剤の含有量が上記上限値以下であると、アスファルトの溶融粘度を低減しやすく、施工時のアスファルトの溶融温度を低減しやすい。 The content of the modifier is preferably 10.6 to 17.6 parts by mass with respect to 100 parts by mass of straight asphalt. When the content of the modifier is at least the above lower limit value, the low temperature performance of asphalt is likely to be improved, and the frass embrittlement point is likely to be lowered. When the content of the modifier is not more than the above upper limit value, the melt viscosity of the asphalt can be easily reduced, and the melt temperature of the asphalt at the time of construction can be easily reduced.
＜消臭化合物＞
消臭化合物は、炭酸ナトリウム、炭酸水素ナトリウム、炭酸カリウム及び炭酸水素カリウムから選ばれる１種以上である。
炭酸ナトリウムは、市販の炭酸ナトリウムを用いることができる。
炭酸水素ナトリウムは、市販の炭酸水素ナトリウムを用いることができる。
炭酸カリウムは、市販の炭酸カリウムを用いることができる。
炭酸水素カリウムは、市販の炭酸水素カリウムを用いることができる。
消臭化合物としては、コスト面に優れることから、炭酸ナトリウム、炭酸水素ナトリウムが好ましい。
消臭化合物は、１種を単独で用いてもよく、２種以上を併用してもよい。
<Deodorant compound>
The deodorant compound is one or more selected from sodium carbonate, sodium hydrogen carbonate, potassium carbonate and potassium hydrogen carbonate.
As the sodium carbonate, commercially available sodium carbonate can be used.
As the sodium hydrogen carbonate, commercially available sodium hydrogen carbonate can be used.
As the potassium carbonate, commercially available potassium carbonate can be used.
As the potassium hydrogen carbonate, commercially available potassium hydrogen carbonate can be used.
As the deodorant compound, sodium carbonate and sodium hydrogen carbonate are preferable because they are excellent in cost.
One type of deodorant compound may be used alone, or two or more types may be used in combination.
消臭化合物の含有量は、防水工事用アスファルト１００質量部に対して、０．５〜５．０質量部であり、１．０〜４．０質量部が好ましく、１．０〜３．０質量部がより好ましく、１．０〜２．０質量部がさらに好ましい。消臭化合物の含有量が上記下限値以上であると、発煙及び発臭をより低減しやすい。消臭化合物の含有量が上記上限値以下であると、防水工事用アスファルトに消臭化合物を混合した際の発泡をより抑制しやすい。 The content of the deodorant compound is 0.5 to 5.0 parts by mass, preferably 1.0 to 4.0 parts by mass, and 1.0 to 3.0 parts by mass with respect to 100 parts by mass of asphalt for waterproofing work. By mass is more preferable, and 1.0 to 2.0 parts by mass is even more preferable. When the content of the deodorant compound is at least the above lower limit value, it is easy to reduce smoke and odor. When the content of the deodorant compound is not more than the above upper limit value, it is easier to suppress foaming when the deodorant compound is mixed with the asphalt for waterproofing work.
≪アスファルトの施工方法≫
本発明のアスファルトの施工方法は、防水工事用アスファルトを１５０〜２８０℃に加熱溶融する工程（加熱溶融工程）と、防水工事用アスファルトに消臭化合物を混合する工程（混合工程）と、混合工程で得られた消臭処理済アスファルトを防水工事に用いる工程（施工工程）と、を有する。
本発明のアスファルトの施工方法（すなわち、防水工事用アスファルト組成物の使用方法）について、以下に、工程ごとにより詳細に説明する。
≪Asphalt construction method≫
The asphalt construction method of the present invention includes a step of heating and melting the asphalt for waterproofing work at 150 to 280 ° C. (heat melting step), a step of mixing a deodorant compound with the asphalt for waterproofing work (mixing step), and a mixing step. It has a process (construction process) of using the deodorized asphalt obtained in the above for waterproofing work.
The asphalt construction method of the present invention (that is, the method of using the asphalt composition for waterproofing work) will be described in more detail below for each step.
＜加熱溶融工程＞
加熱溶融工程は、防水工事用アスファルトを加熱溶融する工程である。防水工事用アスファルトを加熱溶融する際の温度は、１５０〜２８０℃が好ましく、１６０〜２６０℃がより好ましく、１７０〜２４０℃がさらに好ましい。防水工事用アスファルトを加熱溶融する際の温度が上記下限値以上であると、防水工事用アスファルトを施工に適した溶融粘度にしやすい。防水工事用アスファルトを加熱溶融する際の温度が上記上限値以下であると、発煙及び発臭をより低減しやすい。
防水工事用アスファルトを加熱溶融する方法は、特に限定されず、公知のアスファルト溶解釜を用いて加熱溶融する方法等が挙げられる。
<Heat melting process>
The heat melting step is a step of heating and melting asphalt for waterproofing work. The temperature at which the asphalt for waterproofing work is heated and melted is preferably 150 to 280 ° C, more preferably 160 to 260 ° C, and even more preferably 170 to 240 ° C. When the temperature at which the asphalt for waterproofing work is heated and melted is equal to or higher than the above lower limit value, the asphalt for waterproofing work tends to have a melt viscosity suitable for construction. When the temperature at which the asphalt for waterproofing work is heated and melted is not more than the above upper limit value, it is easy to reduce smoke and odor.
The method of heating and melting the asphalt for waterproofing work is not particularly limited, and examples thereof include a method of heating and melting using a known asphalt melting pot.
＜混合工程＞
混合工程は、消臭化合物を防水工事用アスファルトに添加する操作（添加操作）と、防水工事用アスファルトと消臭化合物とを攪拌する操作（攪拌操作）とを有する。
添加操作は、加熱溶融した防水工事用アスファルトに、消臭化合物を添加する操作である。
添加操作では、消臭化合物の添加量（以下、「総添加量」ともいう。）は、防水工事用アスファルト１００質量部に対して、０．５〜５．０質量部であり、１．０〜４．０質量部が好ましく、１．０〜３．０質量部がより好ましく、１．０〜２．０質量部がさらに好ましい。総添加量が上記下限値以上であると、発煙及び発臭をより低減しやすい。総添加量が上記上限値以下であると、防水工事用アスファルトに消臭化合物を混合した際の発泡をより抑制しやすい。
<Mixing process>
The mixing step includes an operation of adding the deodorant compound to the asphalt for waterproofing work (addition operation) and an operation of stirring the asphalt for waterproofing work and the deodorizing compound (stirring operation).
The addition operation is an operation of adding a deodorant compound to the heat-melted asphalt for waterproofing work.
In the addition operation, the amount of the deodorant compound added (hereinafter, also referred to as "total amount") is 0.5 to 5.0 parts by mass with respect to 100 parts by mass of asphalt for waterproofing work, which is 1.0. ~ 4.0 parts by mass is preferable, 1.0 to 3.0 parts by mass is more preferable, and 1.0 to 2.0 parts by mass is further preferable. When the total addition amount is at least the above lower limit value, it is easy to reduce smoke and odor. When the total addition amount is not more than the above upper limit value, it is easier to suppress foaming when the deodorant compound is mixed with the asphalt for waterproofing work.
添加操作では、消臭化合物を数回に分けて添加することが好ましい。消臭化合物を数回に分けて添加する場合、消臭化合物の添加回数は、防水工事用アスファルトの容量と攪拌機の能力とにより異なるが、例えば、２〜１０回が好ましく、３〜１０回がより好ましく、４〜１０回がさらに好ましい。消臭化合物の添加回数が上記下限値以上であると、防水工事用アスファルトに消臭化合物を混合した際の発泡をより抑制しやすい。消臭化合物の添加回数が上記上限値以下であると、作業効率を向上しやすい。 In the addition operation, it is preferable to add the deodorant compound in several times. When the deodorant compound is added in several times, the number of times the deodorant compound is added varies depending on the capacity of the asphalt for waterproofing work and the capacity of the stirrer, but is preferably 2 to 10 times, for example, 3 to 10 times. More preferably, 4 to 10 times is further preferable. When the number of times the deodorant compound is added is equal to or greater than the above lower limit value, it is easier to suppress foaming when the deodorant compound is mixed with the asphalt for waterproofing work. When the number of times the deodorant compound is added is not more than the above upper limit value, the work efficiency is likely to be improved.
添加操作では、発泡の様子を目視で確認しながら、消臭化合物を少量ずつ添加することが好ましい。消臭化合物を少量ずつ添加することで、防水工事用アスファルトと消臭化合物との混合物（以下、「混合アスファルト」ともいう。）が、発泡により容器から溢れ出ることを抑制しやすい。消臭化合物の一回当たりの添加量は、例えば、上述した総添加量を上述した添加回数で除することにより求められる。
なお、消臭化合物の一回当たりの添加量は、発泡を抑制する観点から、等量が好ましい。
In the addition operation, it is preferable to add the deodorant compound little by little while visually checking the state of foaming. By adding the deodorant compound little by little, it is easy to prevent the mixture of the waterproof asphalt and the deodorant compound (hereinafter, also referred to as "mixed asphalt") from overflowing from the container due to foaming. The amount of the deodorant compound added at one time is determined, for example, by dividing the above-mentioned total amount of addition by the above-mentioned number of additions.
The amount of the deodorant compound added at one time is preferably the same amount from the viewpoint of suppressing foaming.
添加操作では、防水工事用アスファルトに消臭化合物を添加した際に発泡した場合、消臭化合物の添加を一時停止し、発泡が収まってからさらに消臭化合物を添加することが好ましい。発泡が収まってから消臭化合物を添加することで、混合アスファルトが発泡により容器から溢れ出ることを抑制しやすい。
添加操作では、一定の時間をかけて防水工事用アスファルトに消臭化合物を添加することが好ましい。ここで、「一定の時間」（以下、「添加時間」ともいう。）としては、例えば、１〜３０分間が好ましく、２〜２０分間がより好ましく、３〜１０分間がさらに好ましい。添加時間が上記下限値以上であると、防水工事用アスファルトに消臭化合物を混合した際の発泡をより抑制しやすい。添加時間が上記上限値以下であると、作業効率を向上しやすい。
In the addition operation, when foaming occurs when the deodorant compound is added to the asphalt for waterproofing work, it is preferable to suspend the addition of the deodorant compound and add the deodorant compound further after the foaming has subsided. By adding the deodorant compound after the foaming has subsided, it is easy to prevent the mixed asphalt from overflowing from the container due to foaming.
In the addition operation, it is preferable to add the deodorant compound to the asphalt for waterproofing work over a certain period of time. Here, as the "constant time" (hereinafter, also referred to as "addition time"), for example, 1 to 30 minutes is preferable, 2 to 20 minutes is more preferable, and 3 to 10 minutes is further preferable. When the addition time is at least the above lower limit value, foaming when the deodorant compound is mixed with the asphalt for waterproofing work is more likely to be suppressed. When the addition time is not more than the above upper limit value, the work efficiency is likely to be improved.
以上より、添加操作では、防水工事用アスファルト１００質量部に対して、消臭化合物０．５〜５．０質量部を１〜３０分間かけて、２〜１０回に分けて添加することが好ましい。添加操作では、防水工事用アスファルト１００質量部に対して、消臭化合物０．５〜５．０質量部を２〜２０分間かけて、３〜１０回に分けて添加することがより好ましい。添加操作では、防水工事用アスファルト１００質量部に対して、消臭化合物０．５〜５．０質量部を３〜１０分間かけて、４〜１０回に分けて添加することがさらに好ましい。 From the above, in the addition operation, it is preferable to add 0.5 to 5.0 parts by mass of the deodorant compound to 100 parts by mass of asphalt for waterproofing work in 2 to 10 times over 1 to 30 minutes. .. In the addition operation, it is more preferable to add 0.5 to 5.0 parts by mass of the deodorant compound in 3 to 10 times over 2 to 20 minutes with respect to 100 parts by mass of asphalt for waterproofing work. In the addition operation, it is more preferable to add 0.5 to 5.0 parts by mass of the deodorant compound to 100 parts by mass of asphalt for waterproofing work in 4 to 10 times over 3 to 10 minutes.
攪拌操作は、混合アスファルトを攪拌し、消臭処理済アスファルトを得る工程である。混合アスファルトを攪拌する方法は特に限定されず、常法により攪拌でき、例えば、攪拌機を用いて攪拌できる。混合アスファルトを攪拌する際の攪拌速度は、例えば、２００〜２０００ｒｐｍが好ましく、４００〜１６００ｒｐｍがより好ましく、６００〜１２００ｒｐｍがさらに好ましい。攪拌速度が上記下限値以上であると、混合アスファルトを充分に攪拌できる。攪拌速度が上記上限値以下であると、混合アスファルトの発泡を抑制しやすい。 The stirring operation is a step of stirring the mixed asphalt to obtain deodorized asphalt. The method of stirring the mixed asphalt is not particularly limited, and the mixed asphalt can be stirred by a conventional method, for example, using a stirrer. The stirring speed when stirring the mixed asphalt is, for example, preferably 200 to 2000 rpm, more preferably 400 to 1600 rpm, and even more preferably 600 to 1200 rpm. When the stirring speed is at least the above lower limit value, the mixed asphalt can be sufficiently stirred. When the stirring speed is not more than the above upper limit value, it is easy to suppress the foaming of the mixed asphalt.
攪拌操作では、混合アスファルトが攪拌され、消臭処理済アスファルトとなる。このように、防水工事用アスファルトから発煙や発臭が抑制されるのは、防水工事用アスファルトに含まれる硫黄化合物が、消臭化合物と化学反応し、無色、無臭の硫酸塩（硫酸ナトリウム、硫酸カリウム）に変化するためであると考えられる。 In the stirring operation, the mixed asphalt is stirred to obtain deodorized asphalt. In this way, smoke and odor are suppressed from the asphalt for waterproofing work because the sulfur compound contained in the asphalt for waterproofing work chemically reacts with the deodorizing compound and is a colorless and odorless sulfate (sodium sulfate, sulfate). It is thought that this is because it changes to potassium).
＜施工工程＞
施工工程は、消臭処理済アスファルトを防水工事に用いる工程である。より具体的には、消臭処理済アスファルトを建築物の防水工事に用いる。建築物としては、アパートやマンション、オフィスビル等の人の居住空間、橋梁やダム等の土木構造物等が挙げられる。消臭処理済アスファルトを施工する方法は特に限定されず、常法により施工できる。
本実施形態では、防水工事に用いるアスファルトは、消臭処理済アスファルトであるため、発煙や発臭を抑制できる。
<Construction process>
The construction process is a process of using deodorized asphalt for waterproofing work. More specifically, deodorized asphalt is used for waterproofing of buildings. Examples of buildings include living spaces for people such as apartments, condominiums, and office buildings, and civil engineering structures such as bridges and dams. The method of constructing the deodorized asphalt is not particularly limited, and the asphalt can be constructed by a conventional method.
In the present embodiment, since the asphalt used for waterproofing work is deodorized asphalt, it is possible to suppress smoke and odor.
本発明のアスファルトの施工方法では、加熱溶融工程と混合工程とを有するため、消臭処理済アスファルトが得られる。消臭処理済アスファルトは、臭気の主な原因物質である硫化水素や亜硫酸ガス等の硫黄化合物を、無色、無臭の硫酸塩に変化させているため、施工する際の発煙や発臭をより低減できる。このため、施工時の発煙や発臭を抑制しつつ、防水工事を行うことができる。 Since the asphalt construction method of the present invention includes a heating and melting step and a mixing step, deodorized asphalt can be obtained. Deodorized asphalt changes sulfur compounds such as hydrogen sulfide and sulfurous acid gas, which are the main causative substances of odor, into colorless and odorless sulfates, which further reduces smoke and odor during construction. it can. Therefore, waterproofing work can be performed while suppressing smoke and odor during construction.
以下、実施例を示して本発明を説明するが、本発明は以下の実施例に限定されるものではない。
本実施例において使用した材料は下記のとおりである。ただし、実施例１、４〜１２、１４は、参考例である。
Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to the following examples.
The materials used in this example are as follows. However, Examples 1, 4 to 12, and 14 are reference examples.
［使用材料］
＜防水工事用アスファルト＞
・防水工事用アスファルト１：マルエス（登録商標）コンパウンド６号（防水工事用アスファルト３種の規格に適合）、日新工業（株）製。
・防水工事用アスファルト２：シグマート（登録商標）Ｅ（ストレートアスファルトを原料）、日新工業（株）製。
・防水工事用アスファルト３：シグマート（登録商標）ＥＬ（ストレートアスファルトに改質剤を添加、防水工事用アスファルト３種の規格に適合）、日新工業（株）製。
[Material used]
<Asphalt for waterproofing work>
-Waterproofing asphalt 1: Marues (registered trademark) compound No. 6 (conforms to 3 types of waterproofing asphalt), manufactured by Nissin Kogyo Co., Ltd.
-Waterproof asphalt 2: Sigmat (registered trademark) E (straight asphalt as a raw material), manufactured by Nissin Kogyo Co., Ltd.
-Waterproof asphalt 3: Sigmat (registered trademark) EL (straight asphalt with modifier added, conforms to 3 types of waterproof asphalt standards), manufactured by Nissin Kogyo Co., Ltd.
＜消臭化合物＞
・炭酸ナトリウム：炭酸ナトリウム、（株）トクヤマ製。
・炭酸水素ナトリウム：炭酸水素ナトリウム、ＡＧＣ（株）製。
・炭酸カリウム：炭酸カリウム、ＡＧＣ（株）製。
・炭酸水素カリウム：炭酸水素カリウム、高杉製薬（株）製。
<Deodorant compound>
-Sodium carbonate: Sodium carbonate, manufactured by Tokuyama Corporation.
-Sodium hydrogen carbonate: Sodium hydrogen carbonate, manufactured by AGC Inc.
-Potassium carbonate: Potassium carbonate, manufactured by AGC Inc.
-Potassium hydrogen carbonate: Potassium hydrogen carbonate, manufactured by Takasugi Pharmaceutical Co., Ltd.
［実施例１〜４、比較例１〜２］
容量３Ｌの金属缶に防水工事用アスファルト１を２ｋｇ入れた。防水工事用アスファルト１を１８０℃まで加熱し、溶融させた（加熱溶融工程）。加熱溶融させた防水工事用アスファルト１に、発泡の様子を目視で確認しながら、表１に記載の含有量の炭酸水素ナトリウムを等量ずつ１０回に分け、５分間かけて添加し（添加操作）、混合アスファルトとした。炭酸水素ナトリウムを添加する際の温度は、１８０℃、２３０℃、又は２８０℃とした。この混合アスファルトを攪拌機（プライミクス（株）製）を用いて８００ｒｐｍにて攪拌し（攪拌操作）、消臭処理済アスファルトを得た（以上、混合工程）。得られた消臭処理済アスファルトの表面１０ｃｍの位置から気体を採取し、硫化水素及び亜硫酸ガスの発生量をガス検知管（（株）ガステック製）により測定した。また、得られた消臭処理済アスファルトの臭気を５人のパネラーにより評価した（感応検査）。感応検査の評価基準を以下に示す。
《評価基準》
○：臭気が少ない。
△：臭気がある。
×：臭気が多い。
[Examples 1 to 4, Comparative Examples 1 to 2]
2 kg of asphalt 1 for waterproofing work was put in a metal can having a capacity of 3 L. Asphalt 1 for waterproofing work was heated to 180 ° C. and melted (heat melting step). While visually checking the state of foaming, the sodium hydrogen carbonate having the content shown in Table 1 was added to the heat-melted asphalt 1 for waterproofing work in equal amounts in 10 batches over 5 minutes (addition operation). ), Mixed asphalt. The temperature at which sodium hydrogen carbonate was added was 180 ° C., 230 ° C., or 280 ° C. This mixed asphalt was stirred at 800 rpm using a stirrer (manufactured by Primix Corporation) (stirring operation) to obtain deodorized asphalt (above, mixing step). Gas was collected from a position 10 cm on the surface of the obtained deodorized asphalt, and the amounts of hydrogen sulfide and sulfur dioxide gas generated were measured with a gas detector tube (manufactured by Gastec Co., Ltd.). In addition, the odor of the obtained deodorized asphalt was evaluated by five panelists (sensitivity test). The evaluation criteria for the sensitivity test are shown below.
"Evaluation criteria"
◯: There is little odor.
Δ: There is an odor.
X: There is a lot of odor.
硫化水素及び亜硫酸ガスの発生量（濃度（ｐｐｍ））、感応検査の結果を表１に示す。表中「−」は、消臭化合物を添加しなかったことを表す。表中「×〜△」は、パネラーの評価が「×」又は「△」だったことを表す。表中「△〜○」は、パネラーの評価が「△」又は「○」だったことを表す。 Table 1 shows the amount of hydrogen sulfide and sulfur dioxide generated (concentration (ppm)) and the results of the sensitivity test. In the table, "-" indicates that the deodorant compound was not added. In the table, “× to Δ” indicates that the panelist's evaluation was “×” or “Δ”. In the table, "△ ~ ○" indicates that the panelist's evaluation was "△" or "○".
［実施例５〜８、比較例３］
炭酸水素ナトリウムに代えて炭酸ナトリウムを表２に記載の添加量とした以外は、実施例１〜４と同様に消臭処理済アスファルトを得た。得られた消臭処理済アスファルトの臭気を５人のパネラーにより実施例１〜４と同様に評価した。結果を表２に示す。
[Examples 5 to 8, Comparative Example 3]
Deodorized asphalt was obtained in the same manner as in Examples 1 to 4, except that sodium carbonate was added in place of sodium hydrogen carbonate as shown in Table 2. The odor of the obtained deodorized asphalt was evaluated by five panelists in the same manner as in Examples 1 to 4. The results are shown in Table 2.
［実施例９］
炭酸水素ナトリウムに代えて炭酸水素カリウムを表２に記載の添加量とした以外は、実施例１〜４と同様に消臭処理済アスファルトを得た。得られた消臭処理済アスファルトの臭気を５人のパネラーにより実施例１〜４と同様に評価した。結果を表２に示す。
[Example 9]
Deodorized asphalt was obtained in the same manner as in Examples 1 to 4, except that potassium hydrogen carbonate was added in place of sodium hydrogen carbonate as shown in Table 2. The odor of the obtained deodorized asphalt was evaluated by five panelists in the same manner as in Examples 1 to 4. The results are shown in Table 2.
［実施例１０］
炭酸水素ナトリウムに代えて炭酸カリウムを表２に記載の添加量とした以外は、実施例１〜４と同様に消臭処理済アスファルトを得た。得られた消臭処理済アスファルトの臭気を５人のパネラーにより実施例１〜４と同様に評価した。結果を表２に示す。
[Example 10]
Deodorized asphalt was obtained in the same manner as in Examples 1 to 4, except that potassium carbonate was added in place of sodium hydrogen carbonate as shown in Table 2. The odor of the obtained deodorized asphalt was evaluated by five panelists in the same manner as in Examples 1 to 4. The results are shown in Table 2.
［実施例１１〜１４、比較例４］
炭酸水素ナトリウムに代えて炭酸水素ナトリウムと炭酸ナトリウムとを１：１の質量比で混合した消臭化合物を表３に記載の添加量とした以外は、実施例１〜４と同様に消臭処理済アスファルトを得た。得られた消臭処理済アスファルトの臭気を５人のパネラーにより実施例１〜４と同様に評価した。結果を表３に示す。
[Examples 11 to 14, Comparative Example 4]
The deodorizing treatment was carried out in the same manner as in Examples 1 to 4 except that the deodorizing compound in which sodium hydrogen carbonate and sodium carbonate were mixed at a mass ratio of 1: 1 instead of sodium hydrogen carbonate was used as the addition amount shown in Table 3. Obtained finished asphalt. The odor of the obtained deodorized asphalt was evaluated by five panelists in the same manner as in Examples 1 to 4. The results are shown in Table 3.
［実施例１５］
防水工事用アスファルト１に代えて防水工事用アスファルト２を用い、炭酸水素ナトリウムを添加する際の温度を２００℃とした以外は、実施例２と同様に消臭処理済アスファルトを得た。得られた消臭処理済アスファルトの臭気を５人のパネラーにより実施例１〜４と同様に評価した。結果を表４に示す。
[Example 15]
A deodorized asphalt was obtained in the same manner as in Example 2 except that the asphalt 2 for waterproofing work was used instead of the asphalt 1 for waterproofing work and the temperature at which sodium hydrogen carbonate was added was set to 200 ° C. The odor of the obtained deodorized asphalt was evaluated by five panelists in the same manner as in Examples 1 to 4. The results are shown in Table 4.
［実施例１６］
防水工事用アスファルト１に代えて防水工事用アスファルト３を用い、炭酸水素ナトリウムを添加する際の温度を２３０℃とした以外は、実施例２と同様に消臭処理済アスファルトを得た。得られた消臭処理済アスファルトの臭気を５人のパネラーにより実施例１〜４と同様に評価した。結果を表４に示す。
[Example 16]
A deodorized asphalt was obtained in the same manner as in Example 2 except that the asphalt 3 for waterproofing was used instead of the asphalt 1 for waterproofing and the temperature at which sodium hydrogencarbonate was added was set to 230 ° C. The odor of the obtained deodorized asphalt was evaluated by five panelists in the same manner as in Examples 1 to 4. The results are shown in Table 4.
表１〜４に示すように、本発明を適用した実施例１〜１６は、感応検査の結果が「○」又は「△」だった。また、本発明を適用した実施例１〜４は、同じ温度の比較例１〜２と比べて、硫化水素の濃度及び亜硫酸ガスの濃度が低減していた。
一方、消臭化合物を含有しない比較例１は、全ての温度で感応検査の結果が「×」だった。消臭化合物の含有量が本発明の範囲外である比較例２〜４は、感応検査の結果が２３０℃で「×」又は「△」、２８０℃で「×」だった。
As shown in Tables 1 to 4, in Examples 1 to 16 to which the present invention was applied, the result of the sensitivity test was "◯" or "Δ". Further, in Examples 1 to 4 to which the present invention was applied, the concentration of hydrogen sulfide and the concentration of sulfurous acid gas were reduced as compared with Comparative Examples 1 and 2 at the same temperature.
On the other hand, in Comparative Example 1 containing no deodorant compound, the result of the sensitivity test was "x" at all temperatures. In Comparative Examples 2 to 4 in which the content of the deodorant compound was outside the range of the present invention, the result of the sensitivity test was "x" or "Δ" at 230 ° C. and "x" at 280 ° C.
以上の結果から、本発明を適用した防水工事用アスファルト組成物によれば、発煙、発臭をより低減できることが分かった。 From the above results, it was found that the asphalt composition for waterproofing work to which the present invention is applied can further reduce smoke and odor.
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| JP2021055099A (en) * | 2020-11-27 | 2021-04-08 | 日新工業株式会社 | Asphalt composition for water-proofing work and method for applying asphalt |
| JP7033340B2 (en) | 2020-11-27 | 2022-03-10 | 日新工業株式会社 | Asphalt composition for waterproof construction and asphalt construction method |
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