回弹法检测泵送混凝土换算表.doc

附录B 测区泵送混凝土强度换算表
表B 测区泵送混凝土强度换算表
平均回弹值Rm
测区混凝土强度换算值 （MPa）
平均碳化深度值dm（mm）
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
≥6
18.6
10.0
—
—
—
—
—
—
—
—
—
—
—
—
18.8
10.2
10.0
—
—
—
—
—
—
—
—
—
—
—
19.0
10.4
10.2
10.0
—
—
—
—
—
—
—
—
—
—
19.2
10.6
10.4
10.2
10.0
—
—
—
—
—
—
—
—
—
19.4
10.9
10.7
10.4
10.2
10.0
—
—
—
—
—
—
—
—
19.6
11.1
10.9
10.6
10.4
10.2
10.0
—
—
—
—
—
—
—
19.8
11.3
11.1
10.9
10.6
10.4
10.2
10.0
—
—
—
—
—
—
20.0
11.5
11.3
11.1
10.9
10.6
10.4
10.2
10.0
—
—
—
—
—
20.2
11.8
11.5
11.3
11.1
10.9
10.6
10.4
10.2
10.0
—
—
—
—
20.4
12.0
11.7
11.5
11.3
11.1
10.8
10.6
10.4
10.2
10.0
—
—
—
20.6
12.2
12.0
11.7
11.5
11.3
11.0
10.8
10.6
10.4
10.2
10.0
—
—
20.8
12.4
12.2
12.0
11.7
11.5
11.3
11.0
10.8
10.6
10.4
10.2
10.0
—
21.0
12.7
12.4
12.2
11.9
11.7
11.5
11.2
11.0
10.8
10.6
10.4
10.2
10.0
21.2
12.9
12.7
12.4
12.2
11.9
11.7
11.5
11.2
11.0
10.8
10.6
10.4
10.2
21.4
13.1
12.9
12.6
12.4
12.1
11.9
11.7
11.4
11.2
11.0
10.8
10.6
10.3
21.6
13.4
13.1
12.9
12.6
12.4
12.1
11.9
11.6
11.4
11.2
11.0
10.7
10.5
21.8
13.6
13.4
13.1
12.8
12.6
12.3
12.1
11.9
11.6
11.4
11.2
10.9
10.7
22.0
13.9
13.6
13.3
13.1
12.8
12.6
12.3
12.1
11.8
11.6
11.4
11.1
10.9
22.2
14.1
13.8
13.6
13.3
13.0
12.8
12.5
12.3
12.0
11.8
11.6
11.3
11.1
22.4
14.4
14.1
13.8
13.5
13.3
13.0
12.7
12.5
12.2
12.0
11.8
11.5
11.3
22.6
14.6
14.3
14.0
13.8
13.5
13.2
13.0
12.7
12.5
12.2
12.0
11.7
11.5
22.8
14.9
14.6
14.3
14.0
13.7
13.5
13.2
12.9
12.7
12.4
12.2
11.9
11.7
23.0
15.1
14.8
14.5
14.2
14.0
13.7
13.4
13.1
12.9
12.6
12.4
12.1
11.9
23.2
15.4
15.1
14.8
14.5
14.2
13.9
13.6
13.4
13.1
12.8
12.6
12.3
12.1
23.4
15.6
15.3
15.0
14.7
14.4
14.1
13.9
13.6
13.3
13.1
12.8
12.6
12.3
23.6
15.9
15.6
15.3
15.0
14.7
14.4
14.1
13.8
13.5
13.3
13.0
12.8
12.5
23.8
16.2
15.8
15.5
15.2
14.9
14.6
14.3
14.1
13.8
13.5
13.2
13.0
12.7
24.0
16.4
16.1
15.8
15.5
15.2
14.9
14.6
14.3
14.0
13.7
13.5
13.2
12.9
24.2
16.7
16.4
16.0
15.7
15.4
15.1
14.8
14.5
14.2
13.9
13.7
13.4
13.1
24.4
17.0
16.6
16.3
16.0
15.7
15.3
15.0
14.7
14.5
14.2
13.9
13.6
13.3
24.6
17.2
16.9
16.5
16.2
15.9
15.6
15.3
15.0
14.7
14.4
14.1
13.8
13.6
24.8
17.5
17.1
16.8
16.5
16.2
15.8
15.5
15.2
14.9
14.6
14.3
14.1
13.8
25.0
17.8
17.4
17.1
16.7
16.4
16.1
15.8
15.5
15.2
14.9
14.6
14.3
14.0

平均回弹值Rm
测区混凝土强度换算值 （MPa）
平均碳化深度值dm（mm）
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
≥6
25.2
18.0
17.7
17.3
17.0
16.7
16.3
16.0
15.7
15.4
15.1
14.8
14.5
14.2
25.4
18.3
18.0
17.6
17.3
16.9
16.6
16.3
15.9
15.6
15.3
15.0
14.7
14.4
25.6
18.6
18.2
17.9
17.5
17.2
16.8
16.5
16.2
15.9
15.6
15.2
14.9
14.7
25.8
18.9
18.5
18.2
17.8
17.4
17.1
16.8
16.4
16.1
15.8
15.5
15.2
14.9
26.0
19.2
18.8
18.4
18.1
17.7
17.4
17.0
16.7
16.3
16.0
15.7
15.4
15.1
26.2
19.5
19.1
18.7
18.3
18.0
17.6
17.3
16.9
16.6
16.3
15.9
15.6
15.3
26.4
19.8
19.4
19.0
18.6
18.2
17.9
17.5
17.2
16.8
16.5
16.2
15.9
15.6
26.6
20.0
19.6
19.3
18.9
18.5
18.1
17.8
17.4
17.1
16.8
16.4
16.1
15.8
26.8
20.3
19.9
19.5
19.2
18.8
18.4
18.0
17.7
17.3
17.0
16.7
16.3
16.0
27.0
20.6
20.2
19.8
19.4
19.1
18.7
18.3
17.9
17.6
17.2
16.9
16.6
16.2
27.2
20.9
20.5
20.1
19.7
19.3
18.9
18.6
18.2
17.8
17.5
17.1
16.8
16.5
27.4
21.2
20.8
20.4
20.0
19.6
19.2
18.8
18.5
18.1
17.7
17.4
17.1
16.7
27.6
21.5
21.1
20.7
20.3
19.9
19.5
19.1
18.7
18.4
18.0
17.6
17.3
17.0
27.8
21.8
21.4
21.0
20.6
20.2
19.8
19.4
19.0
18.6
18.3
17.9
17.5
17.2
28.0
22.1
21.7
21.3
20.9
20.4
20.0
19.6
19.3
18.9
18.5
18.1
17.8
17.4
28.2
22.4
22.0
21.6
21.1
20.7
20.3
19.9
19.5
19.1
18.8
18.4
18.0
17.7
28.4
22.8
22.3
21.9
21.4
21.0
20.6
20.2
19.8
19.4
19.0
18.6
18.3
17.9
28.6
23.1
22.6
22.2
21.7
21.3
20.9
20.5
20.1
19.7
19.3
18.9
18.5
18.2
28.8
23.4
22.9
22.5
22.0
21.6
21.2
20.7
20.3
19.9
19.5
19.2
18.8
18.4
29.0
23.7
23.2
22.8
22.3
21.9
21.5
21.0
20.6
20.2
19.8
19.4
19.0
18.7
29.2
24.0
23.5
23.1
22.6
22.2
21.7
21.3
20.9
20.5
20.1
19.7
19.3
18.9
29.4
24.3
23.9
23.4
22.9
22.5
22.0
21.6
21.2
20.8
20.3
19.9
19.5
19.2
29.6
24.7
24.2
23.7
23.2
22.8
22.3
21.9
21.4
21.0
20.6
20.2
19.8
19.4
29.8
25.0
24.5
24.0
23.5
23.1
22.6
22.2
21.7
21.3
20.9
20.5
20.1
19.7
30.0
25.3
24.8
24.3
23.8
23.4
22.9
22.5
22.0
21.6
21.2
20.7
20.3
19.9
30.2
25.6
25.1
24.6
24.2
23.7
23.2
22.8
22.3
21.9
21.4
21.0
20.6
20.2
30.4
26.0
25.5
25.0
24.5
24.0
23.5
23.0
22.6
22.1
21.7
21.3
20.9
20.4
30.6
26.3
25.8
25.3
24.8
24.3
23.8
23.3
22.9
22.4
22.0
21.6
21.1
20.7
30.8
26.6
26.1
25.6
25.1
24.6
24.1
23.6
23.2
22.7
22.3
21.8
21.4
21.0
31.0
27.0
26.4
25.9
25.4
24.9
24.4
23.9
23.5
23.0
22.5
22.1
21.7
21.2
31.2
27.3
26.8
26.2
25.7
25.2
24.7
24.2
23.8
23.3
22.8
22.4
21.9
21.5
31.4
27.7
27.1
26.6
26.0
25.5
25.0
24.5
24.1
23.6
23.1
22.7
22.2
21.8
31.6
28.0
27.4
26.9
26.4
25.9
25.3
24.8
24.4
23.9
23.4
22.9
22.5
22.0
31.8
28.3
27.8
27.2
26.7
26.2
25.7
25.1
24.7
24.2
23.7
23.2
22.8
22.3
32.0
28.7
28.1
27.6
27.0
26.5
26.0
25.5
25.0
24.5
24.0
23.5
23.0
22.6
32.2
29.0
28.5
27.9
27.4
26.8
26.3
25.8
25.3
24.8
24.3
23.8
23.3
22.9

平均回弹值Rm
测区混凝土强度换算值 （MPa）
平均碳化深度值dm（mm）
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
≥6
32.4
29.4
28.8
28.2
27.7
27.1
26.6
26.1
25.6
25.1
24.6
24.1
23.6
23.1
32.6
29.7
29.2
28.6
28.0
27.5
26.9
26.4
25.9
25.4
24.9
24.4
23.9
23.4
32.8
30.1
29.5
28.9
28.3
27.8
27.2
26.7
26.2
25.7
25.2
24.7
24.2
23.7
33.0
30.4
29.8
29.3
28.7
28.1
27.6
27.0
26.5
26.0
25.5
25.0
24.5
24.0
33.2
30.8
30.2
29.6
29.0
28.4
27.9
27.3
26.8
26.3
25.8
25.2
24.7
24.3
33.4
31.2
30.6
30.0
29.4
28.8
28.2
27.7
27.1
26.6
26.1
25.5
25.0
24.5
33.6
31.5
30.9
30.3
29.7
29.1
28.5
28.0
27.4
26.9
26.4
25.8
25.3
24.8
33.8
31.9
31.3
30.7
30.0
29.5
28.9
28.3
27.7
27.2
26.7
26.1
25.6
25.1
34.0
32.3
31.6
31.0
30.4
29.8
29.2
28.6
28.1
27.5
27.0
26.4
25.9
25.4
34.2
32.6
32.0
31.4
30.7
30.1
29.5
29.0
28.4
27.8
27.3
26.7
26.2
25.7
34.4
33.0
32.4
31.7
31.1
30.5
29.9
29.3
28.7
28.1
27.6
27.0
26.5
26.0
34.6
33.4
32.7
32.1
31.4
30.8
30.2
29.6
29.0
28.5
27.9
27.4
26.8
26.3
34.8
33.8
33.1
32.4
31.8
31.2
30.6
30.0
29.4
28.8
28.2
27.7
27.1
26.6
35.0
34.1
33.5
32.8
32.2
31.5
30.9
30.3
29.7
29.1
28.5
28.0
27.4
26.9
35.2
34.5
33.8
33.2
32.5
31.9
31.2
30.6
30.0
29.4
28.8
28.3
27.7
27.2
35.4
34.9
34.2
33.5
32.9
32.2
31.6
31.0
30.4
29.8
29.2
28.6
28.0
27.5
35.6
35.3
34.6
33.9
33.2
32.6
31.9
31.3
30.7
30.1
29.5
28.9
28.3
27.8
35.8
35.7
35.0
34.3
33.6
32.9
32.3
31.6
31.0
30.4
29.8
29.2
28.6
28.1
36.0
36.0
35.3
34.6
34.0
33.3
32.6
32.0
31.4
30.7
30.1
29.5
29.0
28.4
36.2
36.4
35.7
35.0
34.3
33.6
33.0
32.3
31.7
31.1
30.5
29.9
29.3
28.7
36.4
36.8
36.1
35.4
34.7
34.0
33.3
32.7
32.0
31.4
30.8
30.2
29.6
29.0
36.6
37.2
36.5
35.8
35.1
34.4
33.7
33.0
32.4
31.7
31.1
30.5
29.9
29.3
36.8
37.6
36.9
36.2
35.4
34.7
34.1
33.4
32.7
32.1
31.4
30.8
30.2
29.6
37.0
38.0
37.3
36.5
35.8
35.1
34.4
33.7
33.1
32.4
31.8
31.2
30.5
29.9
37.2
38.4
37.7
36.9
36.2
35.5
34.8
34.1
33.4
32.8
32.1
31.5
30.9
30.2
37.4
38.8
38.1
37.3
36.6
35.8
35.1
34.4
33.8
33.1
32.4
31.8
31.2
30.6
37.6
39.2
38.4
37.7
36.9
36.2
35.5
34.8
34.1
33.4
32.8
32.1
31.5
30.9
37.8
39.6
38.8
38.1
37.3
36.6
35.9
35.2
34.5
33.8
33.1
32.5
31.8
31.2
38.0
40.0
39.2
38.5
37.7
37.0
36.2
35.5
34.8
34.1
33.5
32.8
32.2
31.5
38.2
40.4
39.6
38.9
38.1
37.3
36.6
35.9
35.2
34.5
33.8
33.1
32.5
31.8
38.4
40.9
40.1
39.3
38.5
37.7
37.0
36.3
35.5
34.8
34.2
33.5
32.8
32.2
38.6
41.3
40.5
39.7
38.9
38.1
37.4
36.6
35.9
35.2
34.5
33.8
33.2
32.5
38.8
41.7
40.9
40.1
39.3
38.5
37.7
37.0
36.3
35.5
34.8
34.2
33.5
32.8
39.0
42.1
41.3
40.5
39.7
38.9
38.1
37.4
36.6
35.9
35.2
34.5
33.8
33.2
39.2
42.5
41.7
40.9
40.1
39.3
38.5
37.7
37.0
36.3
35.5
34.8
34.2
33.5

平均回弹值Rm
测区混凝土强度换算值 （MPa）
平均碳化深度值dm（mm）
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
≥6
39.4
42.9
42.1
41.3
40.5
39.7
38.9
38.1
37.4
36.6
35.9
35.2
34.5
33.8
39.6
43.4
42.5
41.7
40.9
40.0
39.3
38.5
37.7
37.0
36.3
35.5
34.8
34.2
39.8
43.8
42.9
42.1
41.3
40.4
39.6
38.9
38.1
37.3
36.6
35.9
35.2
34.5
40.0
44.2
43.4
42.5
41.7
40.8
40.0
39.2
38.5
37.7
37.0
36.2
35.5
34.8
40.2
44.7
43.8
42.9
42.1
41.2
40.4
39.6
38.8
38.1
37.3
36.6
35.9
35.2
40.4
45.1
44.2
43.3
42.5
41.6
40.8
40.0
39.2
38.4
37.7
36.9
36.2
35.5
40.6
45.5
44.6
43.7
42.9
42.0
41.2
40.4
39.6
38.8
38.1
37.3
36.6
35.8
40.8
46.0
45.1
44.2
43.3
42.4
41.6
40.8
40.0
39.2
38.4
37.7
36.9
36.2
41.0
46.4
45.5
44.6
43.7
42.8
42.0
41.2
40.4
39.6
38.8
38.0
37.3
36.5
41.2
46.8
45.9
45.0
44.1
43.2
42.4
41.6
40.7
39.9
39.1
38.4
37.6
36.9
41.4
47.3
46.3
45.4
44.5
43.7
42.8
42.0
41.1
40.3
39.5
38.7
38.0
37.2
41.6
47.7
46.8
45.9
45.0
44.1
43.2
42.3
41.5
40.7
39.9
39.1
38.3
37.6
41.8
48.2
47.2
46.3
45.4
44.5
43.6
42.7
41.9
41.1
40.3
39.5
38.7
37.9
42.0
48.6
47.7
46.7
45.8
44.9
44.0
43.1
42.3
41.5
40.6
39.8
39.1
38.3
42.2
49.1
48.1
47.1
46.2
45.3
44.4
43.5
42.7
41.8
41.0
40.2
39.4
38.6
42.4
49.5
48.5
47.6
46.6
45.7
44.8
43.9
43.1
42.2
41.4
40.6
39.8
39.0
42.6
50.0
49.0
48.0
47.1
46.1
45.2
44.3
43.5
42.6
41.8
40.9
40.1
39.3
42.8
50.4
49.4
48.5
47.5
46.6
45.6
44.7
43.9
43.0
42.2
41.3
40.5
39.7
43.0
50.9
49.9
48.9
47.9
47.0
46.1
45.2
44.3
43.4
42.5
41.7
40.9
40.1
43.2
51.3
50.3
49.3
48.4
47.4
46.5
45.6
44.7
43.8
42.9
42.1
41.2
40.4
43.4
51.8
50.8
49.8
48.8
47.8
46.9
46.0
45.1
44.2
43.3
42.5
41.6
40.8
43.6
52.3
51.2
50.2
49.2
48.3
47.3
46.4
45.5
44.6
43.7
42.8
42.0
41.2
43.8
52.7
51.7
50.7
49.7
48.7
47.7
46.8
45.9
45.0
44.1
43.2
42.4
41.5
44.0
53.2
52.2
51.1
50.1
49.1
48.2
47.2
46.3
45.4
44.5
43.6
42.7
41.9
44.2
53.7
52.6
51.6
50.6
49.6
48.6
47.6
46.7
45.8
44.9
44.0
43.1
42.3
44.4
54.1
53.1
52.0
51.0
50.0
49.0
48.0
47.1
46.2
45.3
44.4
43.5
42.6
44.6
54.6
53.5
52.5
51.5
50.4
49.4
48.5
47.5
46.6
45.7
44.8
43.9
43.0
44.8
55.1
54.0
52.9
51.9
50.9
49.9
48.9
47.9
47.0
46.1
45.1
44.3
43.4
45.0
55.6
54.5
53.4
52.4
51.3
50.3
49.3
48.3
47.4
46.5
45.5
44.6
43.8
45.2
56.1
55.0
53.9
52.8
51.8
50.7
49.7
48.8
47.8
46.9
45.9
45.0
44.1
45.4
56.5
55.4
54.3
53.3
52.2
51.2
50.2
49.2
48.2
47.3
46.3
45.4
44.5
45.6
57.0
55.9
54.8
53.7
52.7
51.6
50.6
49.6
48.6
47.7
46.7
45.8
44.9
45.8
57.5
56.4
55.3
54.2
53.1
52.1
51.0
50.0
49.0
48.1
47.1
46.2
45.3
46.0
58.0
56.9
55.7
54.6
53.6
52.5
51.5
50.5
49.5
48.5
47.5
46.6
45.7
46.2
58.5
57.3
56.2
55.1
54.0
52.9
51.9
50.9
49.9
48.9
47.9
47.0
46.1
平均回弹值Rm
测区混凝土强度换算值 （MPa）
平均碳化深度值dm（mm）
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
≥6
46.4
59.0
57.8
56.7
55.6
54.5
53.4
52.3
51.3
50.3
49.3
48.3
47.4
46.4
46.6
59.5
58.3
57.2
56.0
54.9
53.8
52.8
51.7
50.7
49.7
48.7
47.8
46.8
46.8
60.0
58.8
57.6
56.5
55.4
54.3
53.2
52.2
51.1
50.1
49.1
48.2
47.2
47.0
—
59.3
58.1
57.0
55.8
54.7
53.7
52.6
51.6
50.5
49.5
48.6
47.6
47.2
—
59.8
58.6
57.4
56.3
55.2
54.1
53.0
52.0
51.0
50.0
49.0
48.0
47.4
—
60.0
59.1
57.9
56.8
55.6
54.5
53.5
52.4
51.4
50.4
49.4
48.4
47.6
—
—
59.6
58.4
57.2
56.1
55.0
53.9
52.8
51.8
50.8
49.8
48.8
47.8
—
—
60.0
58.9
57.7
56.6
55.4
54.4
53.3
52.2
51.2
50.2
49.2
48.0
—
—
—
59.3
58.2
57.0
55.9
54.8
53.7
52.7
51.6
50.6
49.6
48.2
—
—
—
59.8
58.6
57.5
56.3
55.2
54.1
53.1
52.0
51.0
50.0
48.4
—
—
—
60.0
59.1
57.9
56.8
55.7
54.6
53.5
52.5
51.4
50.4
48.6
—
—
—
—
59.6
58.4
57.3
56.1
55.0
53.9
52.9
51.8
50.8
48.8
—
—
—
—
60.0
58.9
57.7
56.6
55.5
54.4
53.3
52.2
51.2
49.0
—
—
—
—
—
59.3
58.2
57.0
55.9
54.8
53.7
52.7
51.6
49.2
—
—
—
—
—
59.8
58.6
57.5
56.3
55.2
54.1
53.1
52.0
49.4
—
—
—
—
—
60.0
59.1
57.9
56.8
55.7
54.6
53.5
52.4
49.6
—
—
—
—
—
—
59.6
58.4
57.2
56.1
55.0
53.9
52.9
49.8
—
—
—
—
—
—
60.0
58.8
57.7
56.6
55.4
54.3
53.3
50.0
—
—
—
—
—
—
—
59.3
58.1
57.0
55.9
54.8
53.7
50.2
—
—
—
—
—
—
—
59.8
58.6
57.4
56.3
55.2
54.1
50.4
—
—
—
—
—
—
—
60.0
59.0
57.9
56.7
55.6
54.5
50.6
—
—
—
—
—
—
—
—
59.5
58.3
57.2
56.0
54.9
50.8
—
—
—
—
—
—
—
—
60.0
58.8
57.6
56.5
55.4
51.0
—
—
—
—
—
—
—
—
—
59.2
58.1
56.9
55.8
51.2
—
—
—
—
—
—
—
—
—
59.7
58.5
57.3
56.2
51.4
—
—
—
—
—
—
—
—
—
60.0
58.9
57.8
56.6
51.6
—
—
—
—
—
—
—
—
—
—
59.4
58.2
57.1
51.8
—
—
—
—
—
—
—
—
—
—
59.8
58.7
57.5
52.0
—
—
—
—
—
—
—
—
—
—
60.0
59.1
57.9
52.2
—
—
—
—
—
—
—
—
—
—
—
59.5
58.4
52.4
—
—
—
—
—
—
—
—
—
—
—
60.0
58.8
52.6
—
—
—
—
—
—
—
—
—
—
—
—
59.2
52.8
—
—
—
—
—
—
—
—
—
—
—
—
59.7
注:表中未注明的测区混凝土强度换算值为小于10 MPa或大于60MPa。
表中数值是根据曲线方程计算。
附录C 非水平方向检测时的回弹值修正值
表C 非水平方向检测时的回弹值修正值

检 测 角 度
向 上
向 下
90°
60°
45°
30°
-30°
-45°
-60°
-90°
20
-6.0
-5.0
-4.0
-3.0
+2.5
+3.0
+3.5
+4.0
21
-5.9
-4.9
-4.0
-3.0
+2.5
+3.0
+3.5
+4.0
22
-5.8
-4.8
-3.9
-2.9
+2.4
+2.9
+3.4
+3.9
23
-5.7
-4.7
-3.9
-2.9
+2.4
+2.9
+3.4
+3.9
24
-5.6
-4.6
-3.8
-2.8
+2.3
+2.8
+3.3
+3.8
25
-5.5
-4.5
-3.8
-2.8
+2.3
+2.8
+3.3
+3.8
26
-5.4
-4.4
-3.7
-2.7
+2.2
+2.7
+3.2
+3.7
27
-5.3
-4.3
-3.7
-2.7
+2.2
+2.7
+3.2
+3.7
28
-5.2
-4.2
-3.6
-2.6
+2.1
+2.6
+3.1
+3.6
29
-5.1
-4.1
-3.6
-2.6
+2.1
+2.6
+3.1
+3.6
30
-5.0
-4.0
-3.5
-2.5
+2.0
+2.5
+3.0
+3.5
31
-4.9
-4.0
-3.5
-2.5