[{"data":1,"prerenderedAt":61},["ShallowReactive",2],{"q-111180-arch_construction-16":3},{"question":4,"neighbors":26,"sameNumber":45,"prev":34,"next":37},{"id":5,"classKey":6,"session":7,"year":8,"subject":9,"number":10,"groupStem":11,"ownStem":12,"stem":12,"options":13,"answer":18,"answerKind":20,"answerS":11,"answerNote":11,"images":21,"explanation":22,"withheld":11,"deepChars":23,"freq":24,"indexable":25},"arch-111180-801-0103-016","architect","111180",111,"建築構造與施工",16,null,"在一般混凝土施工時，水灰比與混凝土的強度及乾縮度之關聯，下列敘述何者正確？",{"A":14,"B":15,"C":16,"D":17},"水灰比越大其強度越大、乾縮度越大","水灰比越大其強度越小、乾縮度越小","水灰比越大其強度越大、乾縮度越小","水灰比越大其強度越小、乾縮度越大",[19],"D","single",[],"本題考點：混凝土配比中的「水灰比」（拌和水重量與水泥重量之比）對硬固後強度與乾縮量的影響方向，屬材料性質的知識題。\n【正解理由】混凝土的強度來自水泥水化後形成的水泥漿體。水化反應真正用得到的水量有限，多出來的拌和水不參與水化，留在漿體裡，日後蒸發便留下毛細孔隙；水灰比越大，硬固後的孔隙越多、漿體越不緻密，抗壓強度因而下降。同時，這些多餘水分在乾燥過程中逐漸散失，水泥漿體隨之收縮，可散失的水越多，乾縮量也越大。施工端的管制正是圍繞這個關係：依《結構混凝土施工規範》第 7.4.2 節，混凝土運抵工地坍度過低須再拌和時，加水處理須在維持原配比設計水灰比的原則下進行，再拌和後混凝土之實際水灰比不得大於原配比設計之水灰比，且凡經再拌和之混凝土均應抽樣製作試體檢核其強度——任意加水會抬高水灰比、折損強度，所以才要這樣把關。由此可知「水灰比越大，強度越小、乾縮度越大」，故選 D。\n【逐項排除】\n(A) 錯誤。前半「強度越大」方向相反：水灰比提高使漿體孔隙增加，強度是下降而非上升；後半「乾縮度越大」方向雖然正確，整句仍因強度方向錯誤而不成立。改成「強度越小、乾縮度越大」才對。\n(B) 錯誤。前半「強度越小」正確，後半「乾縮度越小」方向相反：水灰比越大，漿體中可蒸發的多餘水分越多，乾燥後收縮越明顯，乾縮度應是變大而不是變小。\n(C) 錯誤。兩個方向都寫反：水灰比增大時強度應變小、乾縮度應變大，本選項正好把強度與乾縮兩者的變化方向同時顛倒。\n(D) 正確。強度隨水灰比增大而降低、乾縮隨水灰比增大而增加，兩個方向都與水泥漿體「多餘水分→孔隙增加→強度下降；多餘水分→乾燥散失→收縮增加」的原理一致。\n【記憶點】水多則孔多、孔多則弱；水多則散失多、散失多則縮——水灰比越大，「強度降、乾縮升」。",665,1,true,[27,30,33,36,39,42],{"number":28,"session":7,"stem":29},13,"常見運用在鋼材料防鏽的材料有那些？①熱浸鍍鋅 ②鋅粉漆 ③粉底烤漆 ④氟碳烤漆",{"number":31,"session":7,"stem":32},14,"木材經乾燥處理後，其功能可以：①呈現木紋增加美觀 ②增加木材結構強度 ③防止真菌生長…",{"number":34,"session":7,"stem":35},15,"有關木材的敘述，下列何者正確？",{"number":37,"session":7,"stem":38},17,"木絲水泥板為室內裝修材的一種，下列何項不是其特性？",{"number":40,"session":7,"stem":41},18,"綠建材：指符合生態性、再生性、環保性、健康性及高性能之建材。下列敘述何者錯誤？",{"number":43,"session":7,"stem":44},19,"地基調查方式包括資料蒐集、現地踏勘或地下探勘等方法，下列敘述何者錯誤？",[46,49,52,55,58],{"number":10,"session":47,"stem":48},"114180","關於建築物構造設計使用建材之溫室氣體排放量評估，下列敘述何者錯誤？名詞翻譯及定義：全…",{"number":10,"session":50,"stem":51},"113190","下列何者不屬於我國「高性能防音綠建材」標章的吸音建材範疇？",{"number":10,"session":53,"stem":54},"112190","下列何者不符合建築技術規則關於分戶樓板之衝擊音隔音構造？",{"number":10,"session":56,"stem":57},"110180","關於國內再生綠建材敘述，下列何者正確？",{"number":10,"session":59,"stem":60},"109180","下列何者不是物理強化玻璃之特性？",1791863202352]