TW201733957A - Concrete repairing material used for filling chink and cementing material thereof - Google Patents
Concrete repairing material used for filling chink and cementing material thereof Download PDFInfo
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本發明有關一種用以填充於裂縫的混凝土修補材料及其膠結材，特別是一種藉由膠結材控制硬固後的修補材料體積變化率介於收縮0.20%及膨脹0.10%的混凝土修補材料及其膠結材。The invention relates to a concrete repairing material and a cementing material thereof for filling a crack, in particular to a concrete repairing material with a volume change rate of shrinkage of 0.20% and an expansion of 0.10% after the hardening of the repairing material by the cementing material and Cemented wood.
混凝土結構體常因環境因素或人為因素造成劣化並產生裂縫，使得水氣滲透至混凝土結構體內部，同時裂縫會影響混凝土結構體的結構強度，因此必須注入修補材料進行填補以補強混凝土結構體強度，若修補材料為水泥質系修補材料時，填補於混凝土結構體裂縫的水泥質系修補材料會因水分散失而造成體積乾縮，使水泥質系修補材料與混凝土結構體之間產生間隙，因此水氣仍然會從間隙滲透至混凝土結構體內部，且間隙仍然會影響該混凝土結構體的結構強度，若修補材料為非水泥質系修補材料時，則常因修補材料與混凝土結構體之間的黏結力不足，在非水泥質系修補材料與混凝土結構體之間仍然會產生間隙。Concrete structures are often deteriorated due to environmental factors or human factors and cracks are generated, so that water and gas penetrate into the interior of concrete structures, and cracks will affect the structural strength of concrete structures. Therefore, it is necessary to inject repair materials to fill the strength of concrete structures. If the repairing material is a cementitious repairing material, the cementitious repairing material filled in the crack of the concrete structure will shrink in volume due to the loss of water dispersion, resulting in a gap between the cementitious repairing material and the concrete structure. Water vapor will still penetrate from the gap into the interior of the concrete structure, and the gap will still affect the structural strength of the concrete structure. If the repair material is a non-cement system repair material, it is often between the repair material and the concrete structure. Insufficient adhesion, gaps still occur between non-cemented repair materials and concrete structures.
本發明之主要目的在於提供一種用以填充於裂縫的混凝土修補材料及其膠結材，藉由膠結材中的轉爐石粉所具有的回脹性，以使該混凝土修補材料硬固後的體積變化率介於收縮0.20%及膨脹0.10%之間，以提高混凝土修補材料之修補強度及與混凝土結構體之間的黏結強度。The main object of the present invention is to provide a concrete repairing material and a cemented material thereof for filling a crack, and the volume change rate of the concrete repairing material after hardening by the reintegration property of the converter stone powder in the cement material It is between 0.20% shrinkage and 0.10% expansion to improve the repair strength of concrete repair materials and the bond strength with concrete structures.
本發明之一種用以填充於裂縫的混凝土修補材料，其用以填補小於1mm的一混凝土結構體裂縫，該混凝土修補材料係由一膠結材、一拌合水及一細骨材混拌而成，重量比介於1:0.45-0.55:1.5-2.0，該膠結材用以提高該混凝土修補材料與一混凝土結構體之間的黏結力，該細骨材之細度模數(FM)介於2.5-3.0，該膠結材包含7-12wt%高爐石粉、10-20wt%轉爐石粉及餘量的水泥，該高爐石粉及該轉爐石粉的粒徑不大於300μm，該轉爐石粉用以控制該混凝土修補材料的體積變化率，使該混凝土修補材料硬固後的體積變化率介於收縮0.20%及膨脹0.10%之間。The utility model relates to a concrete repairing material for filling a crack, which is used for filling a concrete structure crack of less than 1 mm, and the concrete repairing material is formed by mixing a cement material, a mixing water and a fine aggregate. The weight ratio is between 1:0.45-0.55:1.5-2.0, and the cement material is used to improve the adhesion between the concrete repairing material and a concrete structure, and the fineness modulus (FM) of the fine aggregate is between 2.5-3.0, the cement material comprises 7-12wt% blast furnace stone powder, 10-20wt% converter stone powder and the balance cement, the blast furnace stone powder and the converter stone powder have a particle diameter of not more than 300μm, and the converter stone powder is used for controlling the concrete repairing The volume change rate of the material causes the volume change rate of the concrete repair material to be between 0.20% shrinkage and 0.10% expansion.
本發明將7-12wt%的該高爐石粉及10-20wt%的該轉爐石粉混拌於該水泥中作為該混凝土修補材料的該膠結材，藉由該高爐石粉及該轉爐石粉的膠結性提高該混凝土修補材料之黏結力，同時藉由該轉爐石粉的回脹性控制該混凝土修補材料的體積變化率，因此將該混凝土修補材料填補至該混凝土結構體裂縫時，可避免該混凝土修補材料因過度收縮而與該混凝土結構體裂縫之間形成間隙，或因過度膨脹使得該混凝土結構體裂縫持續擴大。In the present invention, 7-12% by weight of the blast furnace stone powder and 10-20% by weight of the converter stone powder are mixed in the cement as the cement material of the concrete repairing material, and the cementation property of the blast furnace stone powder and the converter stone powder is improved. The bonding force of the concrete repairing material, and the volume change rate of the concrete repairing material is controlled by the resilience of the converter stone powder. Therefore, when the concrete repairing material is filled into the crack of the concrete structural body, the concrete repairing material can be prevented from being excessive The shrinkage forms a gap with the crack of the concrete structure, or the crack of the concrete structure continues to expand due to excessive expansion.
請參考第1圖，本發明之混凝土修補材料100係用以填補小於1mm的一混凝土結構體裂縫200，該混凝土結構體裂縫200形成於一混凝土結構體300，該混凝土修補材料100由一膠結材、一拌合水及一細骨材混拌而成，於該膠結材中加入該拌合水拌勻後，再加入該細骨材混拌均勻，該膠結材:該拌合水:該細骨材的重量比介於1:0.45-0.55:1.5-2.0，該膠結材用以提高該混凝土修補材料100與該混凝土結構體300之間的黏結強度，該拌合水符合CNS1237之規範要求，該細骨材之細度模數(FM)介於2.5-3.0並符合CNS1240之規範要求，在本實施例中，該細骨材之細度模數為2.86。Referring to FIG. 1 , the concrete repairing material 100 of the present invention is used to fill a concrete structure crack 200 of less than 1 mm. The concrete structural crack 200 is formed on a concrete structural body 300, and the concrete repairing material 100 is made of a cemented material. And mixing a mixture of water and a fine aggregate, adding the mixing water to the cement and mixing well, and then adding the fine aggregate and mixing uniformly, the bonding material: the mixing water: the fine The weight ratio of the aggregate is between 1:0.45 and 0.55:1.5-2.0, and the cement material is used to improve the bonding strength between the concrete repairing material 100 and the concrete structure 300, and the mixing water meets the requirements of the CNS1237 standard. The fineness modulus (FM) of the fine aggregate is between 2.5 and 3.0 and meets the requirements of the specification of CNS 1240. In the present embodiment, the fineness modulus of the fine aggregate is 2.86.
該膠結材包含7-12wt%高爐石粉、10-20wt%轉爐石粉及餘量的水泥，該高爐石粉比重為2.89，該轉爐石粉比重為3.15，在本實施例中，該高爐石粉及該轉爐石粉使用ASTM #50 篩網過篩後與該水泥混合均勻，該高爐石粉及該轉爐石粉的粒徑不大於300μm，該水泥選自於波特蘭第I型水泥，較佳地，該轉爐石粉為經6個月自然熟成後的轉爐石粉，使其游離氧化物(f-CaO及f-MgO)較低，由於該轉爐石粉具有回脹性，因此該轉爐石粉可用以控制該混凝土修補材料100的體積變化率，請參考第1圖，當該混凝土修補材料100注入該混凝土結構體裂縫200時，該混凝土修補材料100硬固後體積不會因過度收縮，而與該混凝土結構體裂縫200之間形成間隙，亦不會因過度膨脹而將該混凝土結構體裂縫200撐大。The cement material comprises 7-12wt% blast furnace stone powder, 10-20wt% converter stone powder and the balance cement. The blast furnace stone powder has a specific gravity of 2.89, and the converter stone powder has a specific gravity of 3.15. In the embodiment, the blast furnace stone powder and the converter stone powder After being sieved with ASTM #50 sieve, it is uniformly mixed with the cement. The particle size of the blast furnace stone powder and the converter stone powder is not more than 300 μm, and the cement is selected from the Portland Type I cement. Preferably, the converter stone powder is The converter stone powder after natural ripening for 6 months has low free oxides (f-CaO and f-MgO). Since the converter stone powder has resilience, the converter stone powder can be used to control the concrete repairing material 100. For the volume change rate, please refer to FIG. 1 . When the concrete repairing material 100 is injected into the concrete structure crack 200 , the concrete repairing material 100 is hardened and the volume is not excessively contracted, and the concrete structure crack 200 is The gap is formed and the concrete structure crack 200 is not enlarged by excessive expansion.
其中，該膠結材可另包含6-10wt%矽灰，該矽灰平均粒徑約為0.1μm，該矽灰用以填充於該細骨材之間的孔隙，可提高該混凝土修補材料之緻密度及黏結性，然而該矽灰添加量與該混凝土修補材料之流度成反比，因此根據不同的工作性需求，該混凝土修補材料可另包含一減水劑，該減水劑重量為該膠結材重量的0.6-1.0wt%，該減水劑用以增加該混凝土修補材料之流度，因此本發明可藉由該矽灰及該減水劑調整該混凝土修補材料的黏結性及流度，較佳地，該減水劑為AE減水劑。Wherein, the cement material may further comprise 6-10wt% ash, and the ash has an average particle diameter of about 0.1μm, and the ash is used to fill the pores between the fine aggregates, thereby improving the density of the concrete repairing material. Degree and adhesion, however, the amount of ash added is inversely proportional to the fluidity of the concrete repairing material. Therefore, according to different workability requirements, the concrete repairing material may further comprise a water reducing agent, and the weight of the water reducing agent is the weight of the cementing material. 0.6 to 1.0 wt%, the water reducing agent is used to increase the fluidity of the concrete repairing material. Therefore, the present invention can adjust the adhesion and fluidity of the concrete repairing material by the ash and the water reducing agent. Preferably, The water reducing agent is an AE water reducing agent.
請參考第2a及2b圖，其為該混凝土修補材料之配比設計表，N表示一般配比，其水膠比為0.4，C表示CNS1010設計標準配比，其水膠比為0.485，S表示矽灰，E表示膨脹劑，B表示轉爐石粉， A表示減水劑，數字分別表示矽灰、轉爐石粉、膨脹劑或減水劑的重量百分比，其中，膨脹劑為石灰系邦得士S.E膨脹劑(Bonddex S.E. Expansion agent)，作為對照組與轉爐石粉進行比較。Please refer to Figures 2a and 2b, which is the ratio design table of the concrete repairing material. N indicates the general ratio. The water-to-binder ratio is 0.4, C indicates the standard ratio of CNS1010 design, and the water-to-binder ratio is 0.485.矽 ash, E means expansion agent, B means converter stone powder, A means water reducing agent, the figures respectively represent the weight percentage of ash, converter stone powder, expansion agent or water reducing agent, wherein the expansion agent is lime system Bundes SE expansion agent ( Bonddex SE Expansion agent) was compared as a control powder to converter stone powder.
本發明係將不同配比的混凝土修補材料分別混拌均勻後，於兩分鐘內分兩次分別灌入模具中均勻搗實，放置於陰涼乾燥處使不同配比的混凝土修補材料硬固，於24小時後拆模，拆模後的試體立即放入飽和石灰水中進行養護，直至所需養護齡期時取出。The invention combines different proportions of concrete repairing materials separately, and then uniformly fills them into the mold twice in two minutes, and then uniformly compacts them in a cool and dry place to make the concrete repairing materials of different proportions hard and solid. After 24 hours, the mold was removed, and the demolded sample was immediately placed in saturated lime water for curing until it was taken for maintenance.
請參考第3a至3c圖，其為不同配比試體的體積變化試驗結果，於養護齡期3天時分別量測各試體的初始長度，並於養護齡期7、14、21及28天時分別量測各試體長度，將各試體長度與各試體的初始長度相減以取得不同養護齡期的長度變化值，並將各試體的長度變化值除以各試體的初始長度，以換算成各試體的體積變化率，其中，負值的體積變化率表示試體呈現收縮狀態，正值的體積變化率表示試體呈現膨脹狀態，請參考第3a圖，舉例來說，CS10E20試體於養護齡期28天時的體積變化量為0.041，表示CS10E20試體於養護齡期28天時的體積相較於養護齡期3天時膨脹0.041%，而CS10B20試體於養護齡期28天時的體積變化量為-0.011，表示CS10B20試體於養護齡期28天時的體積相較於養護齡期3天時收縮0.011%。Please refer to the figures 3a to 3c, which are the results of the volume change test of different proportions of the test body. The initial length of each test piece is measured at 3 days of curing age, and at the age of 7, 14, 21 and 28 days of curing. The length of each test piece was measured separately, and the length of each test piece was subtracted from the initial length of each test piece to obtain the length change value of different curing ages, and the length change value of each test piece was divided by the initial value of each test piece. The length is converted into the volume change rate of each sample, wherein the volume change rate of the negative value indicates that the test body exhibits a contraction state, and the positive volume change rate indicates that the test body exhibits an expanded state, please refer to Fig. 3a, for example The volume change of CS10E20 specimens at 28 days of curing age was 0.041, indicating that the volume of CS10E20 specimens at 28 days of curing age was 0.041% compared with that at 3 days of curing age, while CS10B20 specimens were cured. The volume change at 28 days of age was -0.011, indicating that the volume of the CS10B20 sample at 28 days of curing age was 0.011% less than that at 3 days of curing age.
請參考第3a及3b圖，其中第3b圖為不同膨脹劑比例的試體於不同養護齡期的體積變化率趨勢圖，由第3b圖可知，無添加轉爐石粉的試體(CS10)體積於養護齡期7至28天之間持續收縮，體積變化率由-0.059%變化至-0.139%，表示CS10試體於養護齡期7至28天的體積收縮率由0.059%增加至0.139%，而添加膨脹劑的試體(CS10E10、CS10E12、CS10E15、CS10E20)於養護齡期14天後開始出現回脹現象，且 CS10E12、CS10E15及CS10E20試體於養護齡期28天時體積變化量已呈正值，表示添加膨脹劑的試體於養護齡期28天時已呈現膨脹狀態。Please refer to Figures 3a and 3b, where Figure 3b shows the trend of volume change rate of samples with different expansion agent ratios at different curing ages. From Figure 3b, the volume of the test body (CS10) without added converter powder is The maintenance period continued to shrink between 7 and 28 days, and the volume change rate changed from -0.059% to -0.139%, indicating that the volumetric contraction rate of CS10 specimens from 7 to 28 days in the curing age increased from 0.059% to 0.139%. The test bodies (CS10E10, CS10E12, CS10E15, CS10E20) with expansion agent began to re-expand after 14 days of curing age, and the volume change of CS10E12, CS10E15 and CS10E20 samples was positive at 28 days of curing age. It means that the test body to which the expansion agent was added has exhibited an expanded state at 28 days of curing age.
請參考第3a及3c圖，其中第3c圖為不同轉爐石粉比例的試體於不同養護齡期的體積變化趨勢圖，由第3c圖可知，添加轉爐石粉的試體(CS10B10、CS10B12、CS10B15、CS10B20)於養護齡期21天時開始出現回脹現象，使混凝土修補材料的體積不再持續收縮，而於養護齡期28天時的體積變化率接近0%，表示添加轉爐石粉的試體於養護齡期28天時已呈現低收縮狀態，若延長其養護齡期，轉爐石粉可使混凝土修補材料達零收縮或微膨脹，由此可知，藉由轉爐石粉的回脹性確實可避免混凝土修補材料的體積持續收縮，且比較轉爐石粉試體及膨脹劑試體的體積變化率可知，雖然轉爐石粉試體的回脹現象晚於膨脹劑試體，但轉爐石粉不像膨脹劑會造成混凝土修補材料過度膨脹，而破壞混凝土結構體的強度，較佳地，本發明之該混凝土修補材料硬固後的體積變化率介於-0.20%至0.10%之間，即表示該混凝土修補材料硬固後的體積變化率介於收縮0.20%至膨脹0.10%之間。Please refer to Figures 3a and 3c, where Figure 3c shows the volume change trend of the samples of different converter powders at different curing ages. From Figure 3c, the test samples with added converter powder (CS10B10, CS10B12, CS10B15, CS10B20) began to swell at 21 days of curing age, so that the volume of concrete repair material no longer continued to shrink, and the volume change rate at 28 days of curing age was close to 0%, indicating that the test body with converter powder was added. At 28 days of curing age, it has a low contraction state. If the maintenance age is extended, the converter stone powder can make the concrete repair material reach zero shrinkage or micro-expansion. It can be seen that the concrete repair can be avoided by the reintegration of the converter stone powder. The volume of the material continues to shrink, and the volume change rate of the converter stone powder sample and the expansion agent sample is compared. Although the back-expansion phenomenon of the converter stone powder test body is later than the expansion agent test body, the converter stone powder does not cause the concrete repair unlike the expansion agent. The material is excessively expanded to damage the strength of the concrete structure. Preferably, the volume change rate of the concrete repairing material of the present invention after hardening is between -0.20% and 0.10%. That means that the rate of change in volume of concrete repair material harden after shrinkage interposed between 0.20% to 0.10% expansion.
請參考第4a至4c圖，其為不同配比的試體(水膠比0.4)於養護齡期7及14天的抗壓強度試驗結果，將達所需養護齡期的各種配比試體取出後，修飾磨平試體表面，並將各種配比試體放置於抗壓試驗機上進行抗壓強度試驗，抗壓試驗機設定為2kgf/sec，抗壓強度為最大荷重值/試體受力面積(kgf/cm2 )，各種配比試體分別進行三次抗壓試驗並取其抗壓強度平均值。Please refer to pictures 4a to 4c, which are the results of compressive strength test of different proportions of samples (water-to-binder ratio of 0.4) at 7 and 14 days of curing age, and the various proportions of the test preparations of the required curing age are taken out. After that, the surface of the test piece was modified and the various proportioned test bodies were placed on a compression test machine for compressive strength test, and the compression tester was set to 2 kgf/sec, and the compressive strength was the maximum load value/test body force. The area (kgf/cm 2 ) was subjected to three compression tests and the average value of the compressive strength was taken for each of the test compositions.
請參考第4a及4b圖，其中第4b圖為不同配比的試體於養護齡期7天的抗壓強度柱狀圖，由第4a及4b圖可知，添加矽灰可提升混凝土修補材料的抗壓強度，因矽灰所含的二氧化矽會與水泥水化所產生的氫氧化鈣生成水化矽酸鈣凝膠，水化矽酸鈣凝膠會填塞於混凝土修補材料的孔隙中而形成堅硬的矽酸鈣，因而提高混凝土修補材料的抗壓強度，而添加膨脹劑則使混凝土修補材料的抗壓強度明顯下降，因膨脹劑降低水泥水化過程所產生的氫氧化鈣生成量，使得混凝土修補材料中的主要強度來源C-S-H膠體生成量減少，因而降低抗壓強度，而添加該轉爐石粉對於該混凝土修補材料的抗壓強度則無明顯影響。Please refer to Figures 4a and 4b, where Figure 4b is a bar graph of compressive strength for different proportions of test specimens at 7 days of curing age. It can be seen from Figures 4a and 4b that adding ash can improve concrete repair materials. Compressive strength, because the cerium oxide contained in the ash will form a hydrated calcium citrate gel with calcium hydroxide produced by cement hydration, and the hydrated calcium citrate gel will be packed in the pores of the concrete repairing material. The formation of hard calcium citrate increases the compressive strength of the concrete repairing material, while the addition of the expanding agent causes the compressive strength of the concrete repairing material to be significantly reduced, and the expansion agent reduces the amount of calcium hydroxide produced by the cement hydration process. The amount of CSH colloid produced by the main strength source in the concrete repairing material is reduced, thereby reducing the compressive strength, and the addition of the converter stone powder has no significant influence on the compressive strength of the concrete repairing material.
請參考第4a及4c圖，其中第4c圖為不同配比的試體於養護齡期14天的抗壓強度柱狀圖，其與養護齡期7天的抗壓強度試驗結果相似，添加矽灰可提升混凝土修補材料的抗壓強度，而添加膨脹劑則使混凝土修補材料的抗壓強度明顯下降，添加轉爐石粉對於混凝土修補材料的抗壓強度則無明顯影響，因此根據不同養護齡期的抗壓強度試驗結果可知，轉爐石粉試體相較於膨脹劑試體具有較高的抗壓強度，因此使用添加轉爐石粉的混凝土修補材料填補混凝土結構體裂縫時，其混凝土結構體強度會大於使用添加膨脹劑的混凝土修補材料，較佳地，本發明之該混凝土修補材料硬固後的抗壓強度介於210-350kgf/cm2 。Please refer to Figures 4a and 4c, where Figure 4c is a bar graph of the compressive strength of the different proportions of the test body at 14 days of curing age, similar to the 7-day compressive strength test results of the maintenance age, adding 矽Ash can improve the compressive strength of concrete repairing materials, while adding expansion agent can significantly reduce the compressive strength of concrete repairing materials. Adding converter stone powder has no obvious influence on the compressive strength of concrete repairing materials, so according to different curing ages The results of compressive strength test show that the converter stone powder sample has higher compressive strength than the expansion agent sample. Therefore, when the concrete repairing material added with converter stone powder is used to fill the crack of the concrete structure, the concrete structure strength will be greater than the use. Preferably, the concrete repairing material of the present invention has a compressive strength after hard setting of 210 to 350 kgf/cm 2 .
請參考第5a至5c圖，其為不同配比的試體(水膠比0.485)於養護齡期3、7及28天的抗壓強度試驗結果，第5b圖為不同膨脹劑比例的試體於不同養護齡期的抗壓強度變化趨勢圖，第5c圖為不同轉爐石粉比例的試體於不同養護齡期的抗壓強度變化趨勢圖，比較第5b及5c圖可知，當試體含有10wt%矽灰的情況下，膨脹劑仍然使混凝土修補材料的抗壓強度明顯下降，而轉爐石粉相較於膨脹劑對於混凝土修補材料的抗壓強度影響較小，因此再次證明添加轉爐石粉的混凝土修補材料相較於添加膨脹劑的混凝土修補材料具有較高的抗壓強度。Please refer to Figures 5a to 5c for the compressive strength test results of different proportions of test specimens (water-binder ratio 0.485) at 3, 7 and 28 days of curing age, and Figure 5b shows the specimens of different expansion agent ratios. Figure 5c shows the change trend of compressive strength of different converters in different curing ages. Figure 5b and 5c show that when the sample contains 10wt In the case of % ash, the expansion agent still significantly reduces the compressive strength of the concrete repairing material, and the converter stone powder has less influence on the compressive strength of the concrete repairing material than the expansion agent, so the concrete repairing of the converter stone powder is again proved. The material has a higher compressive strength than the concrete repairing material to which the expansion agent is added.
請參考第6a及6b圖，其為不同配比(水膠比0.485)的試體黏結強度試驗結果，其中黏結強度試驗係將一混凝土基座400(請參考第6c圖)置於模具中，該混凝土基座400具有一斜切面410、一底面420、一第一側面430及一第二側面440，該斜切面410具有一尖角θ，在本試驗中，該混凝土基座400強度大於4500psi，該斜切面410長度為150±2 mm，該底面420長度為75±2 mm，該第一側面430長度為10±2 mm，該第二側面440長度為140±2 mm，該尖角θ角度為30度，將不同配比的該混凝土修補材料100分別灌入模中均勻搗實，使不同配比的該混凝土修補材料100分別與該混凝土基座400的該斜切面410接觸，24小時後拆模，硬固後的該混凝土修補材料100與該混凝土基座400形成一試體500，將各種配比的該試體500放置於飽和石灰水進行養護，直到試驗所需養護齡期時取出，將達所需養護齡期的該試體500置於抗壓試驗機進行黏結強度試驗，黏結強度為最大荷重值/黏結面積(kgf/cm2 )，其中，黏結面積為該混凝土基座400的該斜切面410面積。Please refer to Figures 6a and 6b for the test results of the test bond strength of different ratios (water-binder ratio 0.485). The bond strength test is to place a concrete base 400 (refer to Figure 6c) in the mold. The concrete base 400 has a chamfered surface 410, a bottom surface 420, a first side surface 430 and a second side surface 440. The chamfered surface 410 has a sharp angle θ. In this test, the concrete base 400 has a strength greater than 4500 psi. The length of the chamfered surface 410 is 150±2 mm, the length of the bottom surface 420 is 75±2 mm, the length of the first side surface 430 is 10±2 mm, and the length of the second side surface 440 is 140±2 mm, and the sharp angle θ The concrete repairing material 100 of different proportions is uniformly tamped into the mold, and the concrete repairing materials 100 of different ratios are respectively contacted with the chamfered surface 410 of the concrete base 400 for 24 hours. After the mold is removed, the concrete repairing material 100 after hardening forms a test body 500 with the concrete base 400, and the sample 500 of various ratios is placed in saturated lime water for maintenance until the curing age of the test is required. Take out, put the test body 500 up to the required curing age in compression The testing machine performs a bonding strength test, and the bonding strength is the maximum load value/bonding area (kgf/cm 2 ), wherein the bonding area is the area of the chamfered surface 410 of the concrete base 400.
請參考第6a圖， CA10試體的黏結強度為70.98kgf/cm2 ，而CA10S10試體的黏結強度為92.97kgf/cm2 ，由此可知添加矽灰可提高試體的黏結強度，因此得知矽灰確實可提高該混凝土修補材料之黏結力。Please refer to Figure 6a. The bonding strength of the CA10 specimen is 70.98kgf/cm 2 , and the bonding strength of the CA10S10 specimen is 92.97kgf/cm 2 . It can be seen that the addition of ash can improve the bonding strength of the specimen, so it is known. The ash can indeed improve the adhesion of the concrete repair material.
請參考第6b圖，其為不同配比試體的黏結強度柱狀圖，由第6b圖可知，膨脹劑造成試體的黏結強度明顯下降，而轉爐石粉對於黏結強度的影響較小，可證明轉爐石粉試體相較於膨脹劑試體具有較高的黏結強度，當使用添加轉爐石粉的混凝土修補材料填補混凝土結構體裂縫時，其與混凝土結構體之間的黏結力會大於使用添加膨脹劑的混凝土修補材料，較佳地，本發明之該混凝土修補材料硬固後的黏結強度介於72-90kgf/cm2 。Please refer to Figure 6b, which is a histogram of the bond strength of different proportions. It can be seen from Figure 6b that the expansion strength of the test body is significantly reduced, and the effect of converter powder on the bond strength is small. The stone powder test body has higher bonding strength than the expansion agent test piece. When the concrete repair material added with the converter stone powder is used to fill the crack of the concrete structure, the adhesion force between the stone powder and the concrete structure body is greater than that of the use of the expansion agent. Preferably, the concrete repairing material of the present invention has a bonding strength after hard setting of 72-90 kgf/cm 2 .
根據上述試驗結果可知，將該膠結材混拌於該混凝土修補材料時，該膠結材中的該轉爐石粉確實可控制該混凝土修補材料的體積變化率，且將該轉爐石粉與膨脹劑相比，該轉爐石粉可使該混凝土修補材料具有較高的抗壓強度及黏結強度，因此當使用該混凝土修補材料填補該混凝土結構體裂縫時，可提高修補後的混凝土結構體強度。According to the above test results, when the cement material is mixed with the concrete repairing material, the converter stone powder in the cement material can control the volume change rate of the concrete repairing material, and the converter stone powder is compared with the expanding agent. The converter stone powder can make the concrete repairing material have high compressive strength and bonding strength, so when the concrete repairing material is used to fill the crack of the concrete structure, the strength of the repaired concrete structure can be improved.
本發明之保護範圍當視後附之申請專利範圍所界定者為準，任何熟知此項技藝者，在不脫離本發明之精神和範圍內所作之任何變化與修改，均屬於本發明之保護範圍。The scope of the present invention is defined by the scope of the appended claims, and any changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention are within the scope of the present invention. .
100‧‧‧混凝土修補材料
200‧‧‧混凝土結構體裂縫
300‧‧‧混凝土結構體
400‧‧‧混凝土基座
410‧‧‧斜切面
420‧‧‧底面
430‧‧‧第一側面
440‧‧‧第二側面
500‧‧‧試體
θ‧‧‧尖角100‧‧‧Concrete repair materials
200‧‧‧ cracks in concrete structures
300‧‧‧Concrete structure
400‧‧‧ concrete base
410‧‧‧Cross section
420‧‧‧ bottom
430‧‧‧ first side
440‧‧‧ second side
500‧‧‧Study θ‧‧‧ sharp corner
第1圖：依據本發明之較佳實施例，一種混凝土修補材料填補於一混凝土結構體裂縫的示意圖。 第2a及2b圖：依據本發明之較佳實施例，該混凝土修補材料之配比設計表。 第3a至3c圖：依據本發明之較佳實施例，該混凝土修補材料之體積變化試驗結果。 第4a至4c圖：依據本發明之較佳實施例，該混凝土修補材料之抗壓強度試驗結果。 第5a至5c圖：依據本發明之較佳實施例，該混凝土修補材料之抗壓強度試驗結果。 第6a至6c圖：依據本發明之較佳實施例，該混凝土修補材料之黏結強度試驗結果。Figure 1 is a schematic view of a concrete repair material filled in a crack of a concrete structure in accordance with a preferred embodiment of the present invention. 2a and 2b: a ratio design table of the concrete repair material in accordance with a preferred embodiment of the present invention. Figures 3a to 3c: Results of volume change tests of the concrete repair material in accordance with a preferred embodiment of the present invention. Figures 4a to 4c: Test results of compressive strength of the concrete repair material in accordance with a preferred embodiment of the present invention. Figures 5a to 5c: Test results of compressive strength of the concrete repairing material in accordance with a preferred embodiment of the present invention. Figures 6a to 6c: Test results of the bond strength of the concrete repair material in accordance with a preferred embodiment of the present invention.
Claims (7)
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