TW500749B - Calcium hydroxide as additive for improving the durability of asphalt pavements and for the production of drainage asphalt mixtures - Google Patents

Abstract

An additive for drainage mixes comprises hydrated lime. In one specific embodiment, the additive is hydrated lime of 80-100% Ca(OH)2 and has particle size distribution of 0.05-300 μm. In one preferred embodiment, the hydrated lime has a purity of around 80-100% Ca(OH)2, and a particle size distribution of around 8-12% in the range of 0.05-0.5 μm, 73-90% in the range of 0.5-75 μm and 0.5-7% in the range of 76-300 μm. According to another aspect, an improved drainage mix is provided containing aggregates, binders and hydrated lime.

Description

500749

Of materials. In particular, the present invention of asphalt paving materials and the present invention relate to a method for producing asphalt paving materials and a method for producing a drainage material having good drainage properties. It is commonly used in asphalt pavement mixtures for road paving, which contains three main types of aggregates, greening binder and filler. Grain is generally graded stone of ㈣: 的 mineral. Fillers are small particles below 75 microns, = the space or void between stone particles. Use

Close-in. In recent years, polymers or tires have been used; = in mixtures. Mix these ingredients in a stack to form a typical: = about 3-7% voided spread. This type of miscible mixture is generally used. It is known in Feng's art that hydrated lime is used as a mineral filler and anti-stripping agent on the compact mixture paving. Exfoliation refers to the loss of moisture from the structure. Use of Hydrated Lime in Asphalt Pavement Mixtures in a Previous Technical Document Published by the National Lime Associatión (i 984) (Use 〇f H ydrated Limein A spha 11 P aving M i X tures) in,

Kennedy discusses the divestiture mechanism and proposes a treatment. These methods include achieving appropriate densification to reduce air voids, thereby preventing water from penetrating into the mixture; providing rapid removal of surface moisture from the pavement through a suitable pavement height above the groundwater level to provide appropriate Drainage; or use treatment materials to prevent water penetration. Hydrated lime is one of the most effective methods for treating pellets. It has been proposed that the calcium

^ 9118227.ptd Page 5 V. Description of the invention (2) Acid salt bonding and the improvement of moisture resistance through shellfish. In some cases, the lime hardens and reacts to form a 7% air standard. It is known that the effective method of moisture resistance is that the void volume of the water-repellent mixture and the dense mixture is relatively high, and it is achieved by using angular stone and removing it through Car i pha11e). The fractions are directly passed through the paving joint. Furthermore, noise from the surrounding environment is polluted in humid climates or from dense cities. Moisture damage, however, leads to a summary of the invention. Possible interactions or modification of the acidic part of the green. Calcium silicate is formed between the calcium in one of the pellets having a coating on the surface of the mud or clay and the silicon oxide in the clay. In this prior art report, the interstitial mixture was tested and it was confirmed that when the mixture is to be introduced into the moon, it is a type of asphalt pavement that is modified from g, hemp, and θ-Hangan asphalt mixture. material. The main difference between the drains is in the range of about 15-25% for medium-sized drainage pavements. This series of fine polymer modified asphalt binders (such as Galle ^) or reduce the fine particle content from the mixture or the water-based paving due to the high porosity can make water $, thus improving the wet weather The cushioning effect of the airbag in the driving bar can reduce the road pollution. Therefore, this type of mixture is particularly useful for road noise pollution, which is an environmentally-concerned population. Its porosity will also make drainage The material is susceptible to poor durability. According to one aspect, the present invention provides an additive for a water-repellent mixture, which includes hydrated lime. In a specific embodiment, the additive is a hydrate of M—100% Ca (OH) 2 Lime, and has a particle size distribution of 0.05-300 microns. In a preferred embodiment, hydrated lime has about 80% to 1%

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500749 ——---- V. Description of the invention (4) -------— _____ The binder is mixed into a mixture and compacted, so that it contains ‘J, mixed. The mixture is poured onto the roadbed; and the description of the mixed asphalt is made to a drainage asphalt pavement with a gap of 5%. The following detailed description will be used for each specific example. However, familiar with the technology ^: the basic principles of the present invention is better, the present invention should not be Chu = Tian Ming The following description is to be explained in the following description and application; discussed in the original. In addition, there are no special ingredients or materials. &, using specific terms to refer to 2 may be referred to by different names:; = =: Dang Ming •, different names are different, but the function is not different. This document is not intended to be a coincidence with the scope of the patent. . In the following "have" and "include" are 2 "," include ", used here; == ...". The gap value should be set, and a significant amount is not allowed: monthly paving refers to a shop with a minimum of 7% jitter refers to an empty paving with a target of 15_25%. Drainage material. , Value, so that the water can be used in April, the actual mixture refers to the mixing method it contains, and spread on 73 * Asphalt mixture with a standard anti-paving material will produce a dense = even with the standard Batch type or continuous mixing: D means that it contains < f green, which can produce drainage and dicyanide and spread on the road = part. When the void refers to the existence of the forming material d ... It is estimated by measuring the bulk density of the mixture, after :; j-gap, its code — to be calculated from the volume of the pellets and $ 8 page 89! 18227.ptd V. Description of the invention (5) Filled with the adhesive. Filler refers to the fine material added to the mixture to make the air bag between the stone granules. The durability of elongation can be measured by measuring the stability of Marshall (Marsha 11), the tensile strength, N, the modulus of elasticity, and the resistance to moisture damage. The relative resistance of mixtures to genitals can be evaluated by comparing their structural properties before and after simulated weather storm treatments, including the Texas boiling test and the trajectory test. Texas Boiling Test "A visual assessment of the relative peel resistance of granules of a standing compound. If one or more of the test results show that there is an improvement over the same mixture without the hydrated lime additive, then the mixture with the hydrated lime additive is considered a mixture Good durability. It can be used in a quasi-method to produce hydrated lime as an additive for drainage mixed according to the present invention. In another aspect, type C hydrated stone is the best material for additives. The various types of additives are described below. ^ Y manufacturing method, and its use in drainage mixture. / 、 丞 今 1 ^ _ 的 ash additive, refer to the figure / 'Root • Hydrated Lime (Ca⑽) 2 of the present invention, using Liangquan lime processing technology Manufacture. Typical, Gan 4 ⑷ 利 Ca (CaCOs ± ^ ^ (Ca〇 ;, Pt ^) digestion to generate water a lime Ca (〇H) 2. Sometimes under the wood or k-engineering to separate the particles And: remove impurities. These non-essential steps, two no. One method of downstream processing is to use air dotted lines to separate significantly. If this step is performed, it depends on the particle size distribution; therefore: the fines are A, B or C Type hydrated lime. 89118227.ptd Page 9 500749 V. Description of the invention (6) Figure 2 A-C shows specific examples of the particle size distribution of three types of hydrated lime particles. In the example of type A hydrated lime shown in Figure 2 A It has a fairly narrow particle size distribution, among which 100% of the hydrated lime particles are between 0.5-75 microns. The type B hydrated lime example shown in Figure 2B shows the intermediate particle size distribution, which has About 93% is in the range of 0.5-75 micro-mining, and 6% is in the range of 0.05-0.5 microns. The type C hydrated lime example shown in Figure 2C shows the widest particle size distribution, which has about 88% In the range of 0.5-75 microns; 10% in the range of 0.05-0.5 microns; and [5% in the range of 76-300 microns. Table 1 shows 3 types of hydration The general range of lime.

Η type. The best concentration is 3% of the dry weight of the pellets. ^ About 2% 〇 items

In order to implement the hair ash powder and the amount of 0.5-5%. The concentration is known as a barrier per skill. According to the durability of this product, the result (not shown) is clear for the produced hydrated lime which can be divided into A and B particles. The better concentration is dry hydrated lime per dry weight of granules. The use of water while still retaining drainage shows that the structural properties of the hydrated lime material are reacted to form a hydrated lime to improve the drainage history of the historic mixture. The addition to the drainage mixture does not adversely affect it.

V. Description of the invention (7) Good drainage and mixed people 4 'Can be used to improve the produced / σ The drainage of the mixture according to the present invention Another-preferred specific examples: U :::-or multiple structural properties . Table 2 shows the potential gains obtained according to the present invention; ash. Study. In these examples of towels, each, single, ·; Marshall ’s stable ground or c-type hydrated stone cubes, "people will be early in the morning dry weight 1 pellet 2% dry weight of A, B Fat Figure ^ So 3. Normal grade 60/70 pitch or Galle type ΥΛΛ · τ sticky / draining mixture in boat. Use 3 stability, heart c /: Drainage floor produced by human stone II It is expected that Marshall I and ci water a lime in Bazhong showed the highest increase. It also improved the asexual weights of both the f pass and the admixture modified adhesive by 15-17% (results not shown) Table 2 Types of drainage mixtures Types of hydrated lime additives (2%) Before the weather exposure procedure, the stability of the Marshall was changed compared to the control group without additives. Polymer modified adhesive type A + 0 · 76kN (7 · 8%) polymer modified adhesive type B + 2.15kN (22.0%) polymer modified adhesive type C + 2.74kN (28.0%)

500749 V. Description of the invention (8) Ordinary Adhesive Type A + 1.38kN (15.4%) Ordinary Adhesive Type B + 1.35kN (15.0%) Ordinary Adhesive Type C + 2.77kN (30.8%) Use hydrated lime to improve Durability of water-repellent mixtures Added: 1-3% hydrated lime to improve the durability of water-repellent mixtures against moisture damage. In a preferred embodiment, 2% hydrated lime is used. In the preferred embodiment, 2% Type C hydrated lime is added to the drainage mixture. Laboratory simulations were performed to evaluate the effectiveness of the invention. All samples were exposed to weathering (including 2 hours of wetting and 2 hours of drying) before 120 Mars before testing the Marshall stability and resilience modulus. Table 3 shows the effect on the resilience modulus after adding A, B or C type hydrated lime to a common grade 60/70 binder containing 4.5% or a polymer modified binder. Table 3 Types of drainage mixtures Types of hydrated lime additives After weather exposure procedures, the change in the modulus of resilience of the modified group compared to the control group without additives No polymer modified modifier -13% Polymer modified 2% A type + 11.1% polymer modified 2% type B + 68. 1 ° / 〇

89118227.ptd Page 12 500749 V. Description of the invention (9) +76. 9% polymer-modified adhesive __ 1. 1% +88: 3% + 25.5% ordinary adhesive ordinary adhesive ordinary adhesive Agent ordinary adhesive 1 ~ ^ + 37.9% —5 times water 5 ash W [After the treatment, the rebound modulus has a significant decrease, and general combination: storm 22; =!:, Type of hydrated lime 2 Official == # 二 iicW〗 The resilience modulus of the two compounds is obvious.

= Two: Γ The polymer modification adhesive is the most effective, and A 垔 贝 彳 is effective. Figures 3A & 3B show more common adhesives; i ^; f ;; (reSlStant t〇

Li makes the same degree of agent ..., according to the present invention-:: modified; = cost of manufacturing a mixture compared with the addition of poly ash; :: = secondary drainage material. … From the use of lime f on an ordinary adhesive. In one example, the performance of the adhesive of the present invention is the same, and the decrease is: J :: Get J and modified by polymer. If you need to further improve the performance, ϋ :: = Manufactured by adding lime additives to the conventionally known thin 2 =, the other thing is-it has excellent manufacturing of drainage materials. The test results (not shown) also show significant degradation of the Ma Shi program. In addition, as shown in Figure 2

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One corpse / f has a laboratory day '. A π w ^ cut palace 1 improves the durability of the two types of row mixtures. Warp hair and cloth are effective, while the two types are different from warp polymers. The performance of the adhesives for kisses is the same. Table 4 shows the use of 2% A, B, or c. "Tear, hold"-the result of trying to separate from the U-ren's "Shams' Furten". Using all two types of hydrated stones, some ancient stains on β Α scare, 4 ^: man w Α has observed that the adhesive coating performance is improved. For example, according to the visual evaluation made by the adhesive coating green @ 百八 ^, Μ 你 田 聪 t 4 ·, the effect of the boiling test on the larger size pellets is more ^ y, η ^ Tt ruler when not used When lime is used, the finer granules tend to be more dense than the coarser granules. When using lime ^, ^; the correlation of bucket size is less significant. Of the three types, 1 water 3 lime has the best performance. Table 4 Types of binders in the mixture Types of hydrated lime additives 13. 0 9. 5 Granules, 4.75 Size (m 1.18 m) All sizes modified by polymer without 80% 8 5% 85% 85% 100 % Polymer modified 2% A type 95% 9 5% 95% 98% 98%, polymer modified 2% B type 95% 9 0% 95% 95% 98% polymer modified 2% C Type 98% 9 5% 98% 98% 98% _ ^ JtG60 / 70 70% 6 0% 85% 90% 95% Ordinary G60 / 70-~~~-J Tong G60 / 70 _2 ° / 〇90% 9 0% 100% 100% 98% 2% Type B 100% 9 5% 95% 95% 98% Normal G60 / 70 ^ L ----- 2% Type C 100% 10 0% 100% 100% 100%

Page 14 V. Description of the invention (11) Figures 3 A and 3 B are shown in Genta 4.5% ordinary grade 60/70. Sticky ^ = The manufactured materials are handed over to the agent (Figure 3 A ) Of ordinary drainage mixture ^ 3B) or two kinds of drainage of polymer-modified cemented hydrated lime additives: ,, θ = = nine :: test results. No sign of failure. Adding any two = two, the rut-resistant mite lime, which is a water-repellent mixture in the wheel track test, can improve both depths. By using hydrated lime to add λ to the two types of mixtures, the rut has a polymer modified bond Agent d ?: about -half, and for tools, and for those with ordinary adhesives, 'θ = s up to 6,000 wheels passed unobserved' signs of failure. : Objects up to 5,000 wheels, polymer-modified adhesives. Three types of additives are mixed with lime and ordinary adhesives: objects are equally effective, and type B and c hydrated lime are added. The performance in the cube was better than that of type A. Hydrated lime can be used in a variety of ways, some non-limiting examples, to drainage mixtures. The following is a description of Example 1 (a) Moist or wet pellets are delivered to the plant. (b) Add dry hydrated lime to "°° pellets. i Wet or moist (:; mixtures that have not undergone dry and no procedures are dried together in a dryer. (The dried mixture is placed in a hot box (E) Release the granules of the specified grade to the batch mixer. (F) Mix in the batch mixer.

89118227.ptd 500749 V. Description of the invention (12) (g) Blended with softening adhesive. (h) Pour the mixture on the designated wear road and compact the wear road to the desired degree of compaction. Example 2 Dry hydrated lime was added to the wet or moist pellets, and then a small amount of water was sprayed on the mixture, followed by steps (c) to (h) of Example 1. Example 3 A small amount of water was sprayed on the wet pellets, and then dry hydrated lime was added, followed by steps (c) to (h) of Example 1. Example 4 The hydrated lime slurry was sprayed on the wet pellets until the desired concentration was reached, and then steps (c) to (h) of Example 1 were performed. Example 5 Dry hydrated lime was added to dry granules previously subjected to a common drying procedure, that is, after steps (a) to (f) of Example 1. The softened asphalt binder was then added to the lime-particulate mixture, that is, steps (g) to (h) of Example 1. Example 6 Dry hydrated lime was directly added to the softened asphalt binder, and then steps (a) to (h) of Example 1 were performed. Example 7 Quick lime powder was mixed with wet granules, and some water was sprayed to completely hydrate the raw lime. Steps (a) to (h) of Example 1 are then performed. Although the present invention refers specifically to the aforementioned types of hydrated lime and drainage

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Use it as a material. "The use of divalent anodes can be regarded as modified. It includes descriptions of asphalt compounds or natural use, but for the present, it is necessary to be familiar with the technology. Considering many of the bonding as equivalent ions in the row of ions." But not limited to the company (Ameri Natural rubber modified adhesive should be clearly limited to the manufacturer's changes in water-based mixed materials. The agent is included in the can Gi quality adhesive including drawings and structure. In addition, durable The drainage can not be separated and modified. The materials in the composition, such as in addition to Galle, are modified in accordance with this hard asphalt, or, but are not limited to the purpose of illustration, and should not 'clearly see the method of the present invention The spirit and scope of the illustrated invention in many applications of mixturesFor example, although hydrated stone is an example of the additive, it has dolomite lime and thorium hydroxide. In addition to fat, other types of inventions can be used as drainage mixtures. Medium-quality adhesive (hard pitch purchased from American Hard Co.) and its combination. According to the present invention, it is possible to make grades 40/50, 60/70,

80/100, 120/150, or a combination. Various types of modified or common binders can be mixed with suitable mineral pellets and lime additives to make improved drainage mixtures and paving materials according to the present invention.

500749 Brief description of drawings Figure 1 is a schematic diagram showing a conventional manufacturing method of hydrated lime. Figures 2A-C show the particle size distribution of A-C type hydrated lime particles, respectively. Figures 3A and B show wheel tracks on a pavement made in accordance with the present invention compared to a conventional water-repellent mixture containing Garefat (Figure 3A) or a common grade 60/70 adhesive (Figure 3B). Test (whee 1 trackingtest) result 0 Φ

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Claims (1)

500749 Emperor It contains 9L 5. 24 additives to modify the durability of the hydrated lithic mixture. 2 If the bite lime has a purity of 50 ~ 99% of Ca (〇H \ 4 不 ϊϋίΓ, the additive of item 1), among which the drainage mixed 〇 物 更 agger 3 stone granules and adhesives. Among them, the adhesive is among them. 3. If the additive in the scope of patent application No. 2 is an ordinary adhesive or modified adhesive. 4. If applying for a patent The third item in the scope is the Yuetong Specialty 40/50 adhesive, the ordinary grade 60/70 adhesive, the ordinary 80/100 adhesive, the travel tonic stem a, and such as the mouth brake Tongtong Grade 1 20 / 1 5 0 adhesive, adhesive modified by hard asphalt a [adhesive modified by synthetic rubber, adhesive modified by natural rubber, adhesive modified by polymer or cariphalte) ° 5. The additive according to any one of items 1 to 4 in the scope of patent application, wherein the hydrated lime has a purity of 80-99% iCa (〇H) 2. The additive of any one, wherein the hydrated lime has 8-12% in the range of 0.05-0.5 microns, and 73-90 % Particle size distribution in the range of 0.5 to 75 micrometers and 0.5 to 7% in the range of 76 to 300 micrometers. Additives, wherein the drainage mixture is used to make asphalt paving materials with at least 15% voids. 8-An additive for drainage mixtures used to make asphalt paving materials, the additives are basically selected from the group consisting of hydration Lime, magnesium hydroxide and dolomite; the hydrated lime has a Ca (OH) 2 with a purity of 50-99 ° /. 500749 --- ^ 8911 «997_ 年月 日 __ 你 ΓΡ 1-6. Application for Patent Scope 9 • For the additive in the scope of Patent Application No. 8, wherein the drainage mixture contains at least 15% voids. I 0 · If the additive is in the scope of patent application No. 8 or 9, wherein the hydrated lime has a purity of 80-99% 0 & (01〇2. II. If the additive in the scope of patent application No. 8 or 9 is, The hydrated lime has 8-1 2% in the range of 0.05-0.5 μm, 73-90% in the range of 0.5-75 μm and 0.5-7% in 76-3 0 0 Particle size distribution in the range of micrometers. 1 2 · —A mixture for the production of drainage asphalt paving, which contains mineral pellets, binders and hydrated lime; the concentration of hydrated lime is 0.5-5% and has Ca (OH) 2 with a purity of 50-99%. 1 3 · As in the mixture of patent application No. 丨 2, wherein the adhesive is an ordinary adhesive or a modified adhesive. 1 4 · If you apply for a patent The mixture of item 13 in the range, wherein the adhesive is ordinary grade 40/50 adhesive, ordinary grade 60/70 adhesive, ordinary grade 80/1 00 adhesive, ordinary grade 1 20/1 50 adhesive hard / Main ^ Modified Adhesive, Synthetic Rubber Modified Adhesive, T & @ w 、, 2 Natural Rubber Modified Adhesive, Polymer modified adhesive or Calafate. ^ Sigh 15. If any one of the claims 12 to 14 of the scope of the patent application, and & D, the mixture can be manufactured to contain at least 1 5% voiding secretion material. [Tu Qing Qing Pu its 16 · As in the application of any one of the 12 to 14 scope of the patent application, the adhesive is the 4-5% volume / volume of the mixture. 1 7 · As in any one of items 12 to 14 of the scope of patent application > 89118227.ptc page 20 correction 5% of the scope of patent application ‘The hydrated lime concentration is dry weight 丨. 5-2. 5% per pellet. 8. The mixture according to any one of claims 12 to 14 in the scope of patent application, wherein the hydrated lime has Ca (OH) 2 having a purity of 80-99%. 1, 9 · If the mixture of any one of items 12 to 14 of the scope of the patent application, its hydrated lime has 8-12% in the range of 0.05-0.5 micron, 90% in Within the range of 0.5-75 microns and 0.5-7 ° /. Particle size distribution in the range of 76-30 μm. 20 boards-a mixture used to make drainage asphalt paving materials, including solid materials, polymer-modified binders, and additives selected from the group consisting of hydrated hydrate, magnesium hydroxide, and dolomite; The hydrated lime has a concentration of 5 to 5% and a Ca (〇H ^ with a purity of 50-99%. 2 1) The mixture according to item 20 of the patent application scope, wherein the mixture can be manufactured to contain at least 15% Drainage asphalt pavement with voids. 2 2 · If the mixture in the scope of patent application No. 20 or 2 丨 the mixture mixture is 4-5% volume / volume of this mixture. 23 · If the scope of patent application is in the scope of 20 or 21 & Lime concentration is 1.5-2. 5 ° / 0 per dry weight of the granules. 2 4．As the mixture of patent application No. 20 or 21, the combined lime has a Ca (OH) purity of 80-99%. ) 2. 2 5 · If the application of the patent application range of 20 or 21 of the mixture of hydrated lime has 8-12% in the range of 0. 05-0. 5 microns _ vu / u in the range of 0. 5-75 microns Particle size distribution within the range of 0.5 to 7% within the range of 76 to 30 microns. 2 ··· A method for manufacturing drainage asphalt paving, including: Medium Medium where the sticky among which the water among which the water among which the water is 73-90% 500749 Case No. 89118227 Λ: _ Amendment VI. Patent application scope Mix hydrated lime, mineral pellets and binders into a mixture; pour the mixture on the roadbed; and compact the mixture so that it contains at least 15% voids Drainage asphalt paving; this hydrated lime has Ca (0H) 2 with a purity of 50-9 9%. 89118227.ptc Page 22