多孔混凝土材料的粘结强度.doc

多孔混凝土材料的粘结强度采用无砂大孔混凝土作小区道路与人行道结构层的 施工方法及质量要求，基本上与室内地坪施工相同，不同 之处只是面层的材料及施工方法，即面层采用透水砖，用 砂干铺在浇灌无砂大孔混凝土前，地基应平整、密实、 均匀无砂大孔混凝土最好采用机械搅拌，浇灌时不需振 动，找平即可抹面砂浆或细石混凝土应在无砂大孔混凝 土胶凝后施工，力求干硬，以免形成浆液滚人无砂大孔的 空隙中，宜采用1： (1・5 — 3. 0)的水泥砂浆Using macroporous concrete wi thout sand villa ge road and the pavement structure layer construe tion method and quality requirements, basically t he same as the interior floor construction, the d ifference is only the surface of the materials an d construct ion methods, namely the surface USES t he permeable brick, dry sand. Before the water sa nd free macroporous concrete, foundation should b e flat, dense and uniform・ Macroporous concrete w ithout sand is best by mechanical agitation, pour out, without vibration when leveling・ Plaster mortar or concrete with fine stones should be in the absence of sand macroporous concrete construct! on after gel 1 ing, makes every effort to hard, so as not to form slurry rolled the gap no sand hole, appropriate USES 1: (1.5 a 3. 0) cement mortar・混凝土结构的破坏特征表明，水泥石与粗骨料界面的 粘结强度，往往是混凝土中的最薄弱环节。

尽管无砂大孔 混凝土中的孔洞多、空隙大，但仍具有较高的强度这是 因为单一级配的骨料颗粒在混凝土结构中排列紧密，相互 接触的几率增大，形成无数个大大小小的“拱结构”，使 得骨料界面间的接触点能在外力作用下受力均匀、共同工 作，保证了无砂大孔混凝土具有较高的强度Damage characteristics of concrete structure shows that the cement and aggregate bond strength of interface, are of ten the weakest 1 ink in the concrete. Although macroporous concrete without s and holes and gaps in the big, but it still has h igh strength. This is because the single particle gradation of aggregate in concrete structure is arranged closely, increase chances to contact eac h other, form numerous large and smal1 "arch" str ucture, makes the aggregate contact point to in u nder the action of external force on the interfac e between uniform stress, work together and ensur e that no sand macroporous concrete has higher st rength・由于骨料自身的强度高，胶凝材料的活性、品种、数 量就是决定混凝土强度的关键因素，无砂大孔混凝土没有 细骨料，空隙率大，与一般混凝土比较，水泥石与骨料之 间的粘结强度对其整体的强度，就显得极为重要。

试验结 果及现场抽检表明，无砂大孔混凝土强度等级一般大于C 10Due to the high strength aggregate itself, th e activity of gelled material, type, quantity, is the key factor of concrete strength, big holes d o not fine aggregate concrete without sand, void fraction is large, compared with normal concrete, the bonding strength between cement and aggregat e of its overal1 strength, it is extremely import ant. Experimental results and field sampling observat ion shows that sand f ree macroporous concretestrength grade is genera 1ly greater than clO.无砂大孔混凝土的体积密度是普通混凝土的3/4左 右，一般为，空隙中空气的导热系数值非常小，无砂大孔 混凝土 a值为0. 5 — 0. 9 w/ ( m*k),普通混凝土的值 为1.5 w/ (m*k),即无砂大孔混凝土具有良好的保温隔热 性能。

无砂大孔混凝土的防潮性能，主要取决于它对水分 的毛细孔作用Macroporous concrete without sand volume dens ity is about 3/4 of the ordinary concrete, is com monly, air gap in the coefficient of thermal cond uct ivi ty value is very smal1, no sand hole concre te. A value of 0. 5 a 0・ 9 w/ (m • k), the value of the ordinary concrete is 1.5 w/ (m • k), namel y macroporous concrete without sand has good ther mal insulation performance. No sand macroporous c oncrete moisture-proof performance, mainly depend s on its effect on moisture content of the wool s toma.众所周知，混凝土是密实的多孔材料，由于毛细孔作 用而吸水，但毛细孔作用力是随着多孔体孔径的增大而趋 于减小，毛细孔孔隙中的自由水只有在一定的孔径范围和 压力差作用下才能发生流动。

无砂大孔混凝土具有较大的 非贯通孔洞，不是密实的多孔材质，泰安锅炉自然地破坏 了毛细孔的吸水作用，使地下水及湿气不易浸人无砂大孔 混凝土及其上部的地面结构层，保证了地坪处于干燥状 态It is well known that concrete is reinforced porous material, water absorption due to capi1lar y action, but the capi1lary force is tends to dec rease with the increase of aperture porous body, free water in the capi1lary pore only with certai n pore size range and flow under the action of pr essure difference can occur・ Macroporous concrete without sand is larger the run-through holes, is not compact porous material, naturally destroyed the capi1lary water absorption effect, make the groundwater and moisture not easily immersed peop le without sand macroporous concrete ground strueture and its upper layer, ensure the floor in the dry state・无砂大孔混凝土的骨料级配单一，空隙率大，基本没 有填充材料，尽管无毛细管的作用形成孔洞，但雨水在重 力作用下，能沿着无砂大孔的壁面透过无砂大孔混凝土， 浸人土壤中，不仅可使泰安太阳能小区道路、人行道不易 积水，而且也能补充地下水，使其均匀分布。

No single sand macroporous concrete aggregate grading, void f ract ion, bas ic no fi 1 ler material, although no capi1lary formed by the hole, but th e rain under the action of gravity, along with no sand hole in the wal1 through macroporous concre te without sand, leaching in the soil, is not eas y to water not only can make the village roads, s idewalks, and also can replenish groundwater, mak e its uniform distribution.。